#FF0000 color codes
- HEX
- #FF0000
- HEX8
- #FF0000FF
- HEX8 (Android)
- #FFFF0000
- RGB
- rgb(255, 0, 0)
- RGB (%)
- 100%, 0%, 0%
- HSL
- hsl(0, 100%, 50%)
- HSV / HSB
- hsv(0, 100%, 100%)
- CMYK
- cmyk(0%, 100%, 100%, 0%)
- OKLCH
- oklch(0.628 0.2577 29.23)
- OKLCH (%)
- oklch(62.8% 0.2577 29.23)
- Decimal
- 16711680
What color is #FF0000?
#FF0000 sits at 63% lightness and 0.2577 chroma in OKLCH, hue 29.23°. Its nearest named color is Red (an exact match).
Shades and tints of #FF0000
Tints
Shades
Tones
#FF0000 color harmonies
Complementary
Analogous
Triadic
Split-complementary
Tetradic
Square
Monochromatic
Using #FF0000 in CSS
.text { color: #FF0000; }
.background { background-color: #FF0000; }
.border { border: 2px solid #FF0000; }
/* Modern, perceptually uniform */
.text { color: oklch(0.628 0.2577 29.23); }
/* #FF0000 at 50% transparency */
.overlay { background-color: #FF000080; }Is #FF0000 accessible?
#FF0000 on white text scores 4.00:1; on black text it scores 5.25:1. Black text passes WCAG AA for normal text on #FF0000. Recommended text color on a #FF0000 background: black.
A 5.25:1 vs black
A 4:1 vs white
- AA normal ≥ 4.5 Pass
- AA large ≥ 3 Pass
- AAA normal ≥ 7 Fail
- AAA large ≥ 4.5 Pass
Recommended text color: black
CSS
contrast-color() contrast-color(#FF0000) → black APCA Lc experimental 69.6 Lc · large / secondary text (white text)
WCAG 2.1 AA/AAA is the compliance floor; APCA is an optional readability metric.
Related colors
Nearest featured color: Red #FF0000. See more in the red family on the colors hub.
Frequently asked questions
- What color is #FF0000?
- #FF0000 is Red. In RGB it is rgb(255, 0, 0), and in HSL hsl(0, 100%, 50%).
- What is #FF0000 in RGB?
- #FF0000 converts to rgb(255, 0, 0) — red 255, green 0, blue 0.
- What text color is readable on #FF0000?
- Black text — it has the higher contrast ratio (5.25:1) against #FF0000. Black text passes WCAG AA for normal text on #FF0000.