Red (#ff0000) is a medium, vivid red. It is a CSS named color, so you can use it in stylesheets as color: red as well as by its hex code. In RGB it is rgb(255, 0, 0); in HSL, hsl(0, 100%, 50%).
| Hex | #ff0000 |
|---|---|
| CSS name | red |
| RGB | rgb(255, 0, 0) |
| HSL | hsl(0, 100%, 50%) |
| CMYK | 0%, 100%, 100%, 0% |
| CSS example | color: #ff0000; background-color: rgb(255, 0, 0); |
The hue stepped through seven lightness levels, each matched to the closest named or web-safe color — useful for backgrounds, borders, text and hover states that all belong to one family. Click any swatch for its full breakdown.
Complementary — maximum contrast, from opposite sides of the color wheel:
Analogous — neighbours on the wheel, naturally harmonious:
Triadic — three colors evenly spaced for balanced variety:
Tetradic — four colors at 90° intervals:
On a #ff0000 background, black text gives the better contrast. WCAG requires 4.5:1 for normal text and 3:1 for large text (AA), or 7:1 and 4.5:1 for AAA.
| Text color | Contrast ratio | Normal text | Large text |
|---|---|---|---|
| White text (#ffffff) | 4.00:1 | Fails | AA |
| Black text (#000000) | 5.25:1 | AA | AAA |
The CSS named colors closest to #ff0000:
Turn #ff0000 into a full scheme with the Color Palette Generator, blend it into a background with the CSS Gradient Generator, or browse all named colors.