See a color, type the hex code. How close can you get?
Ready when you are
Hex Guess flips the usual color game around. Instead of dialing sliders, you read a color and type the six-digit hex code you think produced it. It is a test of how well you can translate what your eye sees into the numbers designers and developers work with every day.
A hex code is just three pairs of digits — red, green and blue — each from 00 to FF. Pure red is ff0000, pure green 00ff00, pure blue 0000ff. Once you can estimate roughly how much of each channel a color contains, you can write its hex from sight alone.
Start with the dominant channel. A warm orange is mostly red with a fair amount of green and little blue, so it lands near ff8800-ish. A teal is strong green and blue with little red. The brighter the color, the higher the numbers; the more washed-out, the closer all three pairs sit together. Greys have all three pairs equal, like 808080.
You do not have to nail the hex exactly. Each guess is scored on perceptual color distance with the CIEDE2000 metric, so a code that is a few digits off still scores well if it looks close. A perfect read is 10 points per round, 50 across the five rounds. Developers who stare at hex codes all day tend to do frighteningly well at this one.
