See a color, type the hex code. How close can you get?
Ready when you are
Hex Guess runs the usual color game backwards. Instead of nudging sliders until a swatch matches, you look at a swatch and type the six-digit hex code you think produced it. Each game is five rounds. You see one color per round, enter your best guess, and the game reveals both hex codes side by side so you can see how far off you were before the next swatch appears.
A hex code is three pairs of digits standing for red, green and blue, each running from 00 up to FF (that is 0 to 255 in decimal). Pure red is ff0000, pure green 00ff00, pure blue 0000ff. If you can estimate how much of each channel a color holds, you can write its hex from sight, and that is the whole skill this mode drills.
Find the dominant channel first. A warm orange is mostly red with a moderate amount of green and almost no blue, so it sits somewhere around ff8800. A teal is strong green and blue with little red. After the leading channel, ask how bright the color is: high, even numbers across the board push toward white, low numbers toward black. When all three pairs are equal you get a neutral grey, like 808080 for a mid grey or c0c0c0 for a light one. Saturated colors have a wide spread between their highest and lowest pair; muted, dusty colors bunch the three pairs closer together.
The red pair is often the one people misjudge, because red mixes into so many everyday colors. A useful anchor: FF is maxed, C0 is roughly three-quarters, 80 is about half, 40 is a quarter, and 00 is none. Slot each channel into one of those five buckets before you refine. Getting a channel into the right bucket matters far more than choosing 82 over 85 within it, and the scoring rewards that. You can practice the underlying notation in the guide on how to read hex color codes.
Your typed hex is converted to a color and compared against the target using CIEDE2000, a measure of how different two colors look to the human eye rather than how far apart their digits are. That is why a code several digits off can still score highly if the result reads as the same color. On top of that, Hex Guess pays out extra when you land the hue correctly even if your brightness is a little off, and it trims points when the hue drifts well away from the target. Each round is worth up to 10 points, so a clean game across all five rounds tops out at 50. Blue and grey tones are the usual point-leakers, since small errors in the blue pair shift a color more than most people expect.
Reading hex from sight is a working skill for front-end developers, designers and anyone who edits themes or CSS. This mode builds it by forcing you to name the number rather than recognise a swatch, which is a harder and more durable form of recall. If you would rather move the other direction and reproduce a color you were shown, try the standard color match mode, and the how to play page covers the rest of the variants. Beginners tend to see the fastest gains here, because most people have never had to translate a color into RGB numbers before and the buckets click quickly.
