Hi Product Hunt 👋 Most color-guessing games tell you "close" or "not close". I wanted an actual number, so I built one that measures it. You see a color, you rebuild it by eye with red, green and blue dials, and it scores you with CIEDE2000, the same color-difference formula used to calibrate displays. It opens with a 60-second Color IQ test: a score out of 1000 plus how your eye leans on each channel. Mine: [your score and lean]. After that there's a daily challenge (the same three colors for everyone, one try), eight short drills, duels you send as a link (your friend gets the exact same colors, no account needed), and a photo mode where you match a color from the real world. It's free, with no account and no third-party ads. Pro is $2.99/month and only removes the short breaks between training rounds. Code PRODUCTHUNT gives a month of Pro free. I'm a solo developer. The most useful thing you can tell me is your Color IQ and which mode felt unfair.

Gradients RGB

Test your Color IQ in 60 seconds, then train your eye daily

Test your Color IQ in 60 seconds, then train your eye daily