Colour Perception Test & Game

pixelpick tests how sharply your eyes distinguish between similar shades of colour. Each round fills your screen with a single colour — find the small patch that's ever so slightly different. The differences get subtler as you progress, pushing your colour perception to its limits.

Is this a colour blindness test?

pixelpick is an informal colour perception game rather than a clinical colour blindness test. It's designed to be fun first — but if you consistently struggle to find patches in certain colour families (particularly reds and greens, or blues and yellows), that pattern can be a useful indicator worth discussing with an optometrist. A formal colour vision test from an eye care professional is the right next step for any concerns.

How is colour perception measured?

Colour perception depends on the cone cells in your retina. Most people have three types, sensitive to red, green, and blue wavelengths. The ability to distinguish subtle differences between shades varies significantly between people and declines slightly with age. pixelpick tests this by progressively reducing the lightness difference between the background and the target patch until it becomes almost imperceptible.

What do my results mean?

Your rank reflects how far you progressed through the rounds. Most players reach rounds 4–6 before running out of lives or time. Reaching round 8 or beyond puts you in the top tier of colour perceivers. The "Trickiest colour" stat on your result card shows which colour family gave you the most trouble — a consistent weak spot in one colour family is worth noting.

Game modes

Why is Greyscale harder?

In Greyscale mode, all hue and saturation information is removed — you're working purely on lightness differences. Colour normally gives your visual system additional cues to latch onto. Strip that away and the task becomes significantly harder, even for people with excellent colour perception.

Tips for a better score

Scan methodically rather than randomly — your eye will naturally be drawn to regions of contrast. On harder rounds, try softening your focus rather than staring intently; peripheral vision is often better at detecting subtle luminance differences than direct foveal vision. Playing in a well-lit room with your screen brightness consistent also helps.