Red colour (#FF0000)
Red is medium a red with hex code #FF0000, one of the 148 named colours every browser understands, so you can write color: ${name} directly in CSS. In RGB it is 255, 0, 0; in HSL 0°, 100%, 50%. Use the tool to explore shades and harmonies.
How to use the Red colour
- The colour is pre-filled; click Explore to see all formats, shades and harmonies.
- Edit the value to try a variation.
- Copy the code you need.
Red in every format
| Format | Value |
|---|---|
| HEX | #FF0000 |
| RGB | rgb(255, 0, 0) |
| RGB (0–1) | 1.000, 0.000, 0.000 |
| HSL | hsl(0, 100%, 50%) |
| CMYK (approx.) | 0%, 100%, 100%, 0% |
| CSS | color: red; |
Shades and tints of Red
Same hue and saturation, lightness from 90% to 10%:
#ffcccc | #ff9999 | #ff6666 | #ff3333 | #ff0000 | #cc0000 | #990000 | #660000 | #330000 |
Colours that go with Red
| Harmony | Colours | |
|---|---|---|
| Complementary | #00ffff | |
| Triadic | #00ff00 | #0000ff |
| Analogous | #ff8000 | #ff0080 |
Similar named colours
The closest CSS named colours by RGB distance, useful when you need a keyword instead of a hex code or want a near match:
| Colour | HEX | Difference |
|---|---|---|
| orangered | #ff4500 | close |
| crimson | #dc143c | close |
| firebrick | #b22222 | noticeably different |
| brown | #a52a2a | noticeably different |
| darkred | #8b0000 | noticeably different |
Accessibility
Contrast ratio of Red against white is 4:1 (fails WCAG AA for normal text) and against black 5.25:1 (passes). Use black or very dark text on a Red background rather than white.
Frequently asked questions
What is the hex code for Red?
#FF0000.
What is Red in RGB?
rgb(255, 0, 0).
What colour is complementary to Red?
#00ffff, directly opposite on the colour wheel.
Privacy
This tool runs entirely inside your browser using WebAssembly and the Canvas/File APIs. Your files are never uploaded to ToolFlint or any third party; you can verify this in your browser's network tab or by switching to airplane mode after the page loads. Read how we process files.
Last updated 2026-09-23.