ColorGuesser

You are given the name of a colour and have to find it on a wheel. Sounds trivial until you are asked for teal and discover that your teal and everyone else's teal are two different colours.

1. Read the colour name for the round.
2. Move around the wheel to the shade you think it means.
3. Lock in your pick.
4. See how close you landed. Five colours make a daily run.

There is no knowledge to acquire here, which makes it the most level playing field on this list. A designer will do better than you, but not because they memorised anything. It needs no account at all. The flip side is that it is pure perception, so if you want something to think your way through rather than see your way through, it will feel thin after a few runs.

Scored by distance from the true value, up to 100 points a colour and 500 for the full run. No pass or fail, just how near you got.

Core play

A single default puzzle: you are shown the name of a colour, move around a colour wheel to pick the shade you think matches, lock in your choice, and are scored by distance from the true value. A run consists of five colours (up to 100 points per colour, 500 for a perfect run). There are no alternate modes, options, or separate game types; play is this single, repeated puzzle and the site requires no account.

• The names that cost you points are the vague ones. Everyone agrees on red, nobody agrees on mauve.
• Calibrate your screen or at least turn off night mode. A warm display will drag every guess in the same wrong direction.