Mixwell

Each row and column has fixed endpoint swatches. Mix a chip from the primaries in the tray, then place it in a cell so every line blends smoothly between its two ends.

• Add cyan, magenta, or yellow (plus a white base) to mix a chip, two primaries make a clean secondary.
• Over-mix beyond two components and the chip muddies and drifts off target.
• Click a cell to paint your chip; with an empty tray, click a placed cell to lift it back, or right-click to clear.
• Solve when every row and column blends cleanly within tolerance; faster and fewer placements score higher.

• Desktop: click primaries to mix, click cells to place, right-click a cell to lift a chip; choose size and Daily/Practice.
• Phone & tablet: tap to mix and place, touch-friendly (the right-click lift is a desktop convenience).

• Daily and Practice seeds, plus 4x4, 5x5, and 6x6 board sizes.

• Keep chips to two primaries where you can; muddied chips rarely land within tolerance.
• Solve the endpoints' neighbours first, they pin down the rest of each blend.

Mixwell teaches subtractive colour mixing and gradient reasoning inside a grid puzzle.

• Skills: colour theory, subtractive mixing, gradients
• Best for: roughly grades 4–12 (ages 9+)
• For parents & teachers: how colours mix, as a puzzle.

Mixing a chip from primaries and placing it so every line blends between its endpoints is colour mixing as interpolation.

Requiring you to make the colour rather than choose it is the original demand.

Mixing from primaries is where intuition and physics part company. Pigment mixing is subtractive — each addition removes more light, so mixtures darken — which is why blue and yellow paint make green while blue and yellow light make something close to white.

Mixwell teaches subtractive colour mixing and gradient reasoning inside a grid puzzle. It is an original, free browser game built in-house.

A free, original browser game on PlayPendium. No download, no install.