🌈 Color Picker

How to play

A random colour is shown along with its hex code, and you rebuild it with three RGB sliders. The live match percentage updates as you drag, and submitting banks that percentage as points before the next round starts.

• R, G and B sliders — each runs from 0 to 255 and sets one channel. The number above the slider and the swatch below both update as you drag.
• Submit — adds the current match percentage to your score, prints a verdict, and moves to a new colour after a short pause.
• Skip — advances the round counter and draws a new colour without scoring the current one.

Scoring

The match percentage is 100 minus the straight-line RGB distance between your mix and the target, divided by 4.41 — that divisor makes the largest possible distance, black against white, come out at 0 percent. Submitting adds that whole percentage to your score, so a perfect round is worth 100 points and a poor one simply scores less. Since the score only rises, the Best figure tracks it exactly. The readout is green at 80 and above, amber from 50, and red below.

Tips

• The hex code under the target is the answer. Reading its three pairs as decimal values and setting the sliders to match scores 100 every time.
• If you would rather guess by eye, work one channel at a time from red to blue. Moving two at once makes it hard to tell which one was wrong.
• The sliders start at 128, 128, 128 each round, which is mid grey and already scores a fair percentage against most targets. That is your floor, not a good result.

Frequently asked questions