Tested in November 2026. The questions, the four options, the timer, the scoring and the daily seed were tested in a desktop browser. Colours can look slightly different on different screens, so a very close pair may be harder on a dim phone.
How to play Guess the HEX Colour
- Press Play now, or choose Aaj ka challenge for the same ten colours everyone gets today.
- Look at the big colour block.
- Tap the HEX code you think matches it. You have 10 seconds for each colour.
- Points are 50 to 100 per right answer. The faster you answer, the more you get.
- After ten colours you see your score, your personal best and a share card.
Reading a HEX code
| Part | Meaning | Example |
|---|---|---|
| # | Start of a HEX colour | # |
| First two characters | Red from 00 to FF | FF = full red |
| Middle two | Green from 00 to FF | 80 = about half green |
| Last two | Blue from 00 to FF | 00 = no blue |
Tips to score higher
- Learn the main letters. FF is the brightest, 00 is the darkest.
- High red and green with low blue looks yellow.
- Equal values in all three pairs give grey.
- Compare the options. Often only one pair of characters is different.
Limits to know about
- The options get closer to the real code as you play, so late rounds are meant to be hard.
- Screens differ in brightness and colour, so what you see is not identical everywhere.
- This game helps you get a feel for HEX codes. It is not a colour accuracy test.
Privacy
The game runs in your browser. Nothing is sent to a server. Your best score, streak and sound choice are stored on this device only.
Frequently asked questions
What is the Aaj ka challenge mode?
It gives the same ten colours to everyone on the same date. Play it on consecutive days to build a streak.
How is the streak counted?
The streak goes up by one each day you finish the daily challenge. Miss a day and it starts again from one.
Why do I get fewer points sometimes?
A right answer is worth between 50 and 100 points depending on how fast you were.
Where are HEX codes used?
On websites, in design tools and in many apps to describe a colour. You can try our colour tools too.
Guess the HEX Colour is a free game from ToolsRiver. No sign-up. More games are in the Gaming Tool section.