blue
- HEX
- #0000ff
- RGB
- rgb(0, 0, 255)
- HSL
- hsl(240, 100%, 50%)
- CMYK
- cmyk(100%, 100%, 0%, 0%)
- OKLCH
- oklch(45.2% 0.313 264.052)
blue is a blue color with a cool undertone, written #0000ff in hexadecimal.
Quick facts
| Family | Blue |
|---|---|
| Undertone | cool |
| Lightness | 50% |
| Contrast on white | 8.59 |
| Contrast on black | 2.44 |
Tints, shades and tones
Color harmonies
Accessibility
Contrast ratio against white and black, and the WCAG 2.1 text levels each one passes.
| Background | Contrast ratio | AA normal | AA large | AAA normal | AAA large |
|---|---|---|---|---|---|
| White | 8.59 | Pass | Pass | Pass | Pass |
| Black | 2.44 | Fail | Fail | Fail | Fail |
Similar colors
Sources
This name comes from the CSS color keywords.