#FF0000
red
#FF0000 is a red colour. In RGB it is 255 red, 0 green and 0 blue, which converts to a hue of 0 degrees, 100% saturation and 50% lightness. It is one of the named CSS colours, written as red in stylesheets.
Color values
| HEX | #FF0000 |
|---|---|
| RGB | rgb(255, 0, 0) |
| HSL | hsl(0, 100%, 50%) |
| HSV | hsv(0, 100%, 100%) |
| CMYK | cmyk(0%, 100%, 100%, 0%) |
Contrast and accessibility
Against white the contrast ratio is 4:1, and against black it is 5.25:1. WCAG asks for at least 4.5:1 for normal text and 3:1 for large text.
| Background | Ratio | Normal text | Large text |
|---|---|---|---|
| White | 4:1 | Fail | AA |
| Black | 5.25:1 | AA | AAA |
Tints and shades
Lighter tints move #FF0000 toward white, and darker shades move it toward black.
Tints
Shades
Color harmonies
Complementary
Analogous
Triadic
Split complementary
Code
| CSS | color: #FF0000; |
|---|---|
| CSS rgb() | color: rgb(255 0 0); |
| Tailwind | bg-[#ff0000] |
| SwiftUI | Color(red: 1.000, green: 0.000, blue: 0.000) |
| Android | Color.parseColor("#FF0000") |