How it works
Color Match is a test of colour perception as much as memory: how precisely can you hold a colour in your mind's eye, then rebuild it from nothing? Each round shows a single flat colour panel for a few seconds, then hides it completely — from there you mix your own colour back on three sliders (red, green, blue), starting from neutral grey, and submit whenever you're happy with the match.
What sets the scoring apart from a simple side-by-side comparison is how it's judged: rather than measuring the raw distance between the RGB numbers, Color Match weighs the mismatch the way human eyes actually perceive colour — the eye is far more sensitive to green than to blue, so an identical numeric error in each channel doesn't cost you the same. That perceptual distance becomes an accuracy percentage, which converts to a round score out of 10 on the site's usual curve, with two extra tiers layered on top: 95% accuracy earns an Amazing, and 99.5% or higher earns a true Perfect.
Difficulty changes how long you get to look and how subtle the colours themselves are, from bold five-second targets on Easy to muted two-second flashes on Hard.