A color is made from three numbers: Red, Green, and Blue. Each one goes from 00 to FF in hexadecimal. Slide them around, or type a code yourself!
Use 6 characters: 0-9 and A-F
Nothing saved yet. Make a color and hit "Save".
You already know place value from everyday numbers: each column is worth 10 times the one to its right, and each digit can be 0–9. Hexadecimal works the same way — it just uses base 16. Each digit can be one of sixteen options, so after 9 we keep going with letters:
So A means 10, and F means 15. Each colour channel uses two hex digits. Instead of "tens and ones", the columns are sixteens and ones:
| Sixteens (16) | Ones (1) |
|---|---|
| 0 | 0 |
| 0 × 16 = 0 | 0 × 1 = 0 |
That is why each channel runs from 00 (which is 0, none of that colour) up to FF. And FF is just 15×16 + 15 = 255, the brightest possible! Drag the Red slider above and watch this table change.