Learn how screen color really works, pick up a foolproof strategy, and play a free daily color guessing game in your browser.
▶ Play today's free color puzzle — SpectraA color guessing game challenges you to identify a hidden color. The fun version isn't about having a perfect eye — it's deduction: you make a guess, get a "hotter or colder" clue, and zero in on the answer. Think Wordle, but the secret is a color instead of a word.
Every color on a screen is made by mixing three lights: Red, Green and Blue — that's "RGB." Turn the three dials up and down and you can make any color. Crank all three up and you get white; all the way down is black; lots of red and green with no blue makes yellow, and so on.
To keep things friendly, the daily game Spectra uses a value
from 0 to 9 for each channel instead of the usual 0–255.
So a color is just three digits — for example 1-5-7
is a little red, medium
green, lots of blue: a sky blue.
0–9.Winning strategy — binary search. Start each channel at
5. The arrow tells you which half to keep: if it says higher, try
7; lower, try 3. Each guess halves the range, so any
channel is nailed in about three steps — and the three channels are independent,
so you can solve them in parallel. That's why Spectra is always winnable.
5-5-5 → Red says ▼ (go lower),
Green is exact, Blue says ▲ (go higher). Next try 3-5-7, and keep
halving each off channel until all three turn green.
Do I need good color vision? No — the feedback is numeric (exact / within 2 / far, with arrows), so it's pure logic, not perception.
Is it free? Yes, free, no login, no ads, works on mobile, new color every day — with an unlimited practice mode too.