What is the safest first move in Colony Flow Level 50?

The safest opener is the black 2 stack at the far left of the 5-cell active row, then the white 7 stack in the second cell, then the black 3 stack in the third cell, then the brown 15 stack in the fourth cell, then the yellow 10 stack in the fifth cell. This dispatches the black, white, black, brown, and yellow ants up the dirt path in that order and closes the dark brown hair band, the white face, the brown outline, and the yellow background together before the blue 24 in source row 1, the gray 40 in source row 2, or any late red, pink, or green refill is allowed onto the dirt path. Tap the black 35, blue 24, white 38, and black 40 in source row 1 only after the active row waves have cleared, tap the gray 40, pale yellow 40, pink 4, and brown 12 in source row 2 only after the white 7 wave has cleared, tap the white 40, yellow 40, and black 40 in source row 3 only after the black 3 wave has cleared, and reserve the empty white buffer pad for the late red, pink, green, blue, brown, white, black, and yellow refill waves.

Why does the blue 24 stack jam the route in Colony Flow Level 50?

The blue 24 stack in source row 1 column 2 is the only stack in the source grid that can close the blue jacket / dress across the lower body of the Hello Kitty portrait, and the jacket is one of the largest color regions in the picture. Blue ants use the same dirt path as the black 2, white 7, black 3, brown 15, and yellow 10 ants, so a premature blue click sends blue ants across the hair band that black has to fill, they stall on the still-empty jacket cells, the late blue refill waves waiting in the active queue cannot reach the rest of the jacket, and the late red, pink, green, brown, white, black, and yellow refill waves that have to rise into the empty white buffer pad get stranded behind active blue ants on the dirt path. Tap the blue 24 only after the black 2, white 7, black 3, brown 15, and yellow 10 active row waves have all started closing their color regions.

Colony Flow! level guide

Colony Flow! Level 50 Walkthrough

medium 9 colors

Colony Flow Level 50 is a Hello Kitty-style portrait board where the dark hair band, white face, red bow, blue jacket, pink cheeks, and yellow background all share one route, so the tiny black openers have to frame the portrait before the large white and blue regions arrive.

Board Notes

Layout: The board opens in portrait view. The top half of the screen holds a Hello Kitty-style pixel-art portrait: a wide dark brown hair / hat band stretching across the top, two small green side bows on the ears, a large red bow sitting on the right ear, a wide white face filling the middle, two small black eye cells, two small pink cheek dots, a small yellow nose cell, a blue jacket / dress across the lower body, and two small red hand cells, all sitting on a yellow background tile. Below the dirt strip the working area is a 5-cell top active row plus a 3-row, 4-column source grid. The 5-cell top active row opens as black 2, white 7, black 3, brown 15, yellow 10 with no empty white buffer pad at the start. Source row 1 reads black 35, blue 24, white 38, black 40. Source row 2 reads gray 40, pale yellow 40, pink 4, brown 12. Source row 3 reads white 40, yellow 40, black 40, with the fourth cell of source row 3 still hidden by the dirt strip.
Goal: Black cubes from the black 2 and black 3 active row stacks, the black 35 and black 40 in source row 1, the black 40 in source row 3, and the late black refills that rise into the active row must fill the dark brown hair / hat band across the top of the art and the two small black eye cells. White cubes from the white 7 active row stack, the white 38 in source row 1, the white 40 in source row 3, and the late white refills that rise into the active row must close the wide white face cells in the middle of the art. Brown cubes from the brown 15 active row stack, the brown 12 in source row 2, and the late brown refills that rise into the active row must trace the brown outline and accent cells wrapping the silhouette. Yellow cubes from the yellow 10 active row stack, the pale yellow 40 in source row 2, the yellow 40 in source row 3, and the late yellow refills must fill the yellow background tile and the small yellow nose. Blue cubes from the blue 24 in source row 1 and the late blue refills that rise into the active row must close the blue jacket / dress across the lower body. Red cubes from the late red refills that rise into the active row must fill the large red bow on the right ear and the two small red hand cells. Pink cubes from the pink 4 in source row 2 and the late pink refills must close the two small pink cheek dots on the face. Green cubes from the late green refills that rise into the active row must fill the two small green side bows.
Opening: The run opens with the black 2 stack at the far left of the 5-cell active row. Black 2 is the smallest numbered stack in the active row and the dark brown hair / hat band is the first color region the ant trail reaches from the ant hole, so opening with black 2 dispatches a black ant up the dirt path in the first beat and the lowest dark hair cells start closing immediately. The second confirmed tap is the white 7 stack in the second cell of the active row, which sends a white ant up the same dirt path and starts filling the white face cells in the middle of the portrait. The third confirmed tap is the black 3 stack in the third cell of the active row, which sends another black ant up the dirt path and continues closing the dark hair band. The brown 15 in the fourth cell and the yellow 10 in the fifth cell of the active row are held for one beat so the black and white waves can clear the bottom edge of the hair band and the face before the brown outline or yellow background is touched. The empty white buffer pad that surfaces in the middle of the active row after the first three stacks drain stays open as the late refill waves begin to rise. The black 35, blue 24, white 38, black 40, gray 40, pale yellow 40, pink 4, brown 12, white 40, yellow 40, and black 40 source stacks are all held for one beat so the active row opener waves can clear the perimeter first.
Danger Zone: Most failed runs start at the blue 24 stack in the second cell of source row 1. The blue jacket / dress across the lower body is one of the largest color regions in the picture, and blue ants use the same dirt path as the black, white, brown, and yellow ants. If the player fires the blue 24 before the black 2, white 7, black 3, brown 15, and yellow 10 active row waves have cleared the perimeter of the Hello Kitty portrait, blue ants cross the hair band that black has to fill and stall on the still-empty jacket cells, blocking the late blue refill waves that need to close the rest of the jacket. The other trap is tapping the gray 40 stack in the first cell of source row 2 while white ants are still walking the dirt path up to the white face, because gray ants use the same dirt path as the white ants and a premature gray click strands gray ants on the still-empty outline cells and blocks the pink 4 in source row 2 column 3 plus the late pink refill waves that need to close the two cheek dots. Tapping the pink 4 stack in source row 2 column 3 before the white face cells are at least half-closed is also bad, because pink ants share the path with white ants and stall on the still-empty cheek cells. Letting any late red refill wave rise into the active row before the brown hair band is mostly closed is also bad, because red ants share the path with black and brown ants and stall on the still-empty bow cells.
Mechanics: Level 50 is a multi-stack color-routing board combined with a pixel-art completion goal and a single ant hole, with a Hello Kitty-on-yellow-background scene. The 5-cell top active row plus the 3-row, 4-column source grid makes this a tall 16-stack working area, and there is one empty white buffer pad that surfaces in the middle of the active row after the first three stacks drain, so the player can stage one rising refill at a time. The Hello Kitty pixel art has eight main color families (brown hair band, red bow, white face, pink cheeks, blue jacket, yellow background, green side bows, black eyes) plus the late refill waves and the gray outline accent, and the player has to keep all of those routes staged at once. The 5-cell active row is the queue that pre-holds the black 2, white 7, black 3, brown 15, yellow 10 from the start, and the 3-row, 4-column source grid underneath it acts as the supply that refills the active row as stacks are sent. The single empty white buffer pad is the only true staging space here, so the last small red, pink, green, blue, brown, white, black, and yellow refill waves still need a clean delivery after the bottom of the source grid looks clear. Compared to Level 45's streaming-room scene, this Hello Kitty scene has more distinct color families (eight instead of six) and a much larger white face region that has to close before the small red bow, pink cheek, and green side bow accents are allowed onto the dirt path.

Quick Tips for Colony Flow! Level 50 (spoiler-free)

Tap the black 2, white 7, and black 3 in that order from the active row before you touch the brown 15, the yellow 10, or any source row stack. The dark brown hair band and the white face are the two highest-traffic color regions on the Hello Kitty portrait, and they have to close together before the blue jacket, the red bow, the pink cheek, or the green side bow is allowed onto the dirt path.
Treat the active row as the opener queue and the 3-row, 4-column source grid as the supply. The active row has no empty white buffer slots at the start, so the only way to free a slot for a rising refill is to drain an active row cell. Tap the black 35, blue 24, white 38, and black 40 in source row 1 only after the black 2 wave has cleared, the gray 40, pale yellow 40, pink 4, and brown 12 in source row 2 only after the white 7 wave has cleared, and the white 40, yellow 40, and black 40 in source row 3 only after the black 3 wave has cleared.
Save the blue 24 stack in source row 1 column 2 and the pink 4 stack in source row 2 column 3 for the late game. The blue jacket and the pink cheeks are two of the smallest color regions in the art, and blue and pink ants use the same dirt path as the black, white, brown, and yellow ants, so a premature blue or pink click strands blue or pink ants on the still-empty jacket or cheek cells and blocks the late refill waves that have to rise into the empty white buffer pad.

How to Solve Colony Flow! Level 50 — Full Solution

Tap the black 2 stack at the far left of the 5-cell active row. Black ants walk the dirt path up to the dark brown hair / hat band at the top of the Hello Kitty portrait, and the dark hair cells closest to the ant hole start closing in the first beat. Wait for the first black ants to clear the bottom edge of the art before tapping the next stack. Do not tap the white 7, black 3, brown 15, yellow 10, or any source row stack yet.
Tap the white 7 stack in the second cell of the active row. White ants walk the same dirt path and start filling the white face cells in the middle of the portrait. Black and white share the path, so leave one beat between them so the dark hair cells are mostly closed before the white face cells start filling. Do not tap the black 3, brown 15, yellow 10, or any source row stack yet.
Tap the black 3 stack in the third cell of the active row. Black ants walk the dirt path and continue closing the dark hair band. White and black share the path, so leave one beat between the white wave and the black wave so the white face cells are at least half-filled before the next hair cells start closing. Do not tap the brown 15, yellow 10, or any source row stack yet.
Tap the brown 15 stack in the fourth cell of the active row, then the yellow 10 stack in the fifth cell of the active row. Brown ants start tracing the brown outline and accent cells wrapping the Hello Kitty silhouette, and yellow ants start closing the yellow background tile behind the silhouette. Brown and yellow share the path with black and white, so leave one beat between each wave so the hair band and the face are mostly closed before the outline and the background start filling. Do not tap the empty white buffer pad or any source row stack yet.
Tap the black 35 stack in the first cell of source row 1, then the blue 24 in the second cell, then the white 38 in the third cell, then the black 40 in the fourth cell, as each one rises into the active row. Black ants close the last dark hair cells and the two small black eye cells, blue ants start filling the blue jacket / dress across the lower body, white ants close the rest of the white face cells, and black ants close the last outline cells. Black, blue, white, and black share the path, so leave one beat between each wave so the hair band and the face are at least half-closed before the blue jacket starts filling. Do not tap the gray 40, pale yellow 40, pink 4, brown 12 in source row 2 yet.
Tap the gray 40 stack in the first cell of source row 2 as it rises into the active row, then the pale yellow 40 in the second cell, then the pink 4 in the third cell, then the brown 12 in the fourth cell. Gray ants close the small gray outline accent cells, pale yellow ants start filling the yellow background, pink ants close the two small pink cheek dots on the face, and brown ants close the rest of the brown outline. Gray, pale yellow, pink, and brown share the dirt path, so leave one beat between each wave so the jacket is mostly closed before the cheeks and the outline start filling. Do not tap the white 40, yellow 40, or black 40 in source row 3 yet.
Tap the white 40 stack in the first cell of source row 3, then the yellow 40 in the second cell, then the black 40 in the third cell, as each one rises into the active row. White ants close the last white face cells, yellow ants close the last yellow background cells, and black ants close the last dark hair cells and the two eye cells. White, yellow, and black share the path, so leave one beat between each wave. Do not tap the late red, pink, green, or blue refill waves yet.
Tap the late red refill waves (the 19 red waves) as they rise into the empty white buffer pad to close the large red bow on the right ear and the two small red hand cells. Tap the late pink refill waves to close the second pink cheek dot, the late green refill waves to close the two small green side bows, the late blue refill waves to close the last blue jacket cells, and the late brown, white, black, and yellow refill waves to close the rest of the outline, the face, the hair, and the background. The Hello Kitty silhouette is complete once the last matching cube lands and the level banner appears.

Colors in this level:

Black, White, Brown, Yellow, Blue, Red, Pink, Green, Gray

Common Mistakes to Avoid

Firing the blue 24 stack in source row 1 column 2 before the black 2, white 7, black 3, brown 15, and yellow 10 active row waves have cleared the perimeter of the Hello Kitty portrait, which sends blue ants across the hair band that black has to fill and stalls them on the still-empty jacket cells, blocking the late blue refill waves that need to close the rest of the blue jacket.
Tapping the gray 40 stack in source row 2 column 1 while white ants are still walking the dirt path up to the white face, which strands gray ants on the still-empty outline cells and blocks the pink 4 in source row 2 column 3 plus the late pink refill waves that need to close the two pink cheek dots.
Letting any late red refill wave rise into the active row before the brown hair band is mostly closed, which strands red ants on the still-empty bow cells and blocks the late red refill waves that need to close the large red bow on the right ear and the two small red hand cells.

Frequently Asked Questions

What is the safest first move in Colony Flow Level 50?
The safest opener is the black 2 stack at the far left of the 5-cell active row, then the white 7 stack in the second cell, then the black 3 stack in the third cell, then the brown 15 stack in the fourth cell, then the yellow 10 stack in the fifth cell. This dispatches the black, white, black, brown, and yellow ants up the dirt path in that order and closes the dark brown hair band, the white face, the brown outline, and the yellow background together before the blue 24 in source row 1, the gray 40 in source row 2, or any late red, pink, or green refill is allowed onto the dirt path. Tap the black 35, blue 24, white 38, and black 40 in source row 1 only after the active row waves have cleared, tap the gray 40, pale yellow 40, pink 4, and brown 12 in source row 2 only after the white 7 wave has cleared, tap the white 40, yellow 40, and black 40 in source row 3 only after the black 3 wave has cleared, and reserve the empty white buffer pad for the late red, pink, green, blue, brown, white, black, and yellow refill waves.
Why does the blue 24 stack jam the route in Colony Flow Level 50?
The blue 24 stack in source row 1 column 2 is the only stack in the source grid that can close the blue jacket / dress across the lower body of the Hello Kitty portrait, and the jacket is one of the largest color regions in the picture. Blue ants use the same dirt path as the black 2, white 7, black 3, brown 15, and yellow 10 ants, so a premature blue click sends blue ants across the hair band that black has to fill, they stall on the still-empty jacket cells, the late blue refill waves waiting in the active queue cannot reach the rest of the jacket, and the late red, pink, green, brown, white, black, and yellow refill waves that have to rise into the empty white buffer pad get stranded behind active blue ants on the dirt path. Tap the blue 24 only after the black 2, white 7, black 3, brown 15, and yellow 10 active row waves have all started closing their color regions.