Color Fill
In Color Fill you flood the board from the top left corner with 25 moves. Free, no install, no sign-up, works offline in your browser.
In Color Fill, the top left corner is your territory. Each move floods everything connected to it with the colour you pick, and the board is one colour when you win — in 25 moves or fewer.
about 17.1 KB
Works offline after the first visit. No install, no sign-up.
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How to play Color Fill
What a move actually changes
Every move repaints the whole area connected to the top left corner, not just one square. Pick a colour and that entire connected region changes to it at once, which is why two colours can merge in a single tap.
Only side-by-side squares are connected
Cells join up if they share an edge — up, down, left or right. Two squares touching only at a corner are in separate regions even though they look joined, and that is the most common reason a region is smaller than expected.
Tap a cell to take its colour
You can either tap one of the six swatches along the bottom, or tap any board cell to pick up that cell's colour. Tapping the board is usually faster, since the colour you want is already in front of you.
Picking the colour you already are is refused
Tapping the current colour would burn a move without changing anything, so it is rejected outright and the move is not spent.
Twenty-five moves
Every colour change costs one move. Running out ends the round, and the board being one colour before that wins it — your score counts the moves you needed.
The board never starts solved
A fresh board always contains at least two colours, so there is never a round that is already finished when you open it.
Color Fill Tips and Strategy
Count the borders, not the colours
The best move is the colour running along the longest edge of your territory, because that is the one that gains the most cells in a single tap. Read the outline of the region you control rather than scanning the whole board. With 25 moves available, adding three cells and adding one are not the same value.
Merge two regions in one move
Each move repaints the whole connected region, so a colour touching two of your regions merges them and halves the work from there. Before you take a colour, check whether it appears on more than one border. Diagonal contact does not connect, so working around a corner where two areas almost meet is the cheapest merge there is.
Take the colour from the board
The colour you want is almost always sitting next to your region, and tapping that cell picks it up in one tap. This matters on small boards where a wasted move costs real budget. Spending two taps to choose from the swatches instead of one is the quiet way a 25-move round gets away from you.
Color Fill — Frequently Asked Questions
Why did a big area change at once?
Because it was all one connected region. Everything reachable from the top left corner by shared edges changes together in a single move.
Why is the region smaller than it looks?
Corner contact does not count. Squares that only meet at a corner are separate regions, and only shared edges count as connected.
What happens if I run out of moves?
The round ends and you can start a new board immediately. There is no penalty beyond the round ending.
Does it need installing or an account?
No. It runs in the browser on a phone, tablet or computer and works offline after the first visit.
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