Match the Color is a free online color matching game that tests your ability to recreate colors using RGB sliders. Inspired by the Stroop effect — where your brain struggles to separate conflicting visual information — you must decompose a target color into its red, green, and blue components across 8 rounds of increasing difficulty. Colors range from easy primaries to tricky muted tones like mauve and dusty rose.
Each round presents a target color swatch. Use three RGB sliders (0-255 each) to build your match. You can drag the sliders or click the value boxes to type exact numbers. After submitting, you see your accuracy percentage, the exact hex codes for both colors, and which channel was furthest off. The 8 rounds progress from obvious primaries to subtle, hard-to-decompose colors. Your final score averages all rounds.
The Stroop effect describes cognitive interference when processing conflicting visual information. In this game, it manifests when you try to isolate individual RGB channels from a combined color — your brain wants to see the whole color rather than its separate red, green, and blue components.
Humans can distinguish about 1 million colors, but recreating a specific color from perception alone is much harder. Professional designers typically get within 5% accuracy, while most people average 70-85% when using RGB sliders. Scores above 90% are considered excellent.
RGB sliders control the Red, Green, and Blue light channels of a color, each ranging from 0 to 255. Combining different intensities of these three primary colors of light produces any of the 16.7 million colors displayable on a standard screen.
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Last updated: March 2026 · whatifs.fun — Free interactive games, experiments & simulations