Red

Hex #FF0000, rgb(255 0 0). A red CSS named color.

Red#FF0000

Red color codes

Click any value to copy it.

HEX
RGB
HSL
HSV
HWB
CMYK
OKLCH
OKLab
Lab
LCH
CSS keyword

About Red

Red is a medium vivid red with the hex code #FF0000. In RGB it is made of 255 red, 0 green and 0 blue; in HSL its hue is 0°, with 100% saturation and 50% lightness. Its perceptual lightness (OKLCH L) is 62.8%.

It is a CSS named color, so you can write "red" anywhere CSS accepts a color. Against white it has a contrast ratio of 4.00:1 and against black 5.25:1, so black text reads better on it and passes WCAG AA for normal text.

Tints, shades and tones

Red mixed step by step with white, black and middle gray (#808080).

Tints (with white)

Shades (with black)

Tones (with gray)

Red 50-950 scale

A Tailwind-style scale built in OKLCH; the original color sits on the step with the closest lightness.

Colors that go with Red

Color harmonies rotate the hue in OKLCH and keep the lightness and chroma. Each color links to its closest named color.

Complementary

Analogous

Triadic

Split complementary

Tetradic

Square

Monochromatic

Contrast and readability

WCAG 2 contrast of Red with white and black. The readable text color on Red is black.

Red textSmall text on white

On white4.00:1

AA fail
AA Large pass
AAA fail
UI 3:1 pass

APCA Lc 64

Red textSmall text on black

On black5.25:1

AA pass
AA Large pass
AAA fail
UI 3:1 pass

APCA Lc -38

Black text on Red (#000000)

Test any pair in the contrast checker.

Color blindness preview

How Red appears with each type of color vision deficiency (simulated with the Machado model).

Protanopia#6D5F00
Deuteranopia#A39000
Tritanopia#FF000F
Protanomaly#A75900
Deuteranomaly#BB7D00
Tritanomaly#FF0004
Achromatopsia#7F7F7F

Colors similar to Red

The closest named colors by perceptual difference (OKLab).

Use Red in CSS and Tailwind

CSS

.red {
  color: red; /* #FF0000 */
  background-color: rgb(255 0 0);
  border-color: oklch(62.8% 0.258 29.2);
}

Tailwind CSS

/* Tailwind CSS v4: bg-red-500, text-red-700... */
@theme {
  --color-red-50: #FFF8F7;
  --color-red-100: #FFE8E4;
  --color-red-200: #FFCFC7;
  --color-red-300: #FFA699;
  --color-red-400: #FF6453;
  --color-red-500: #FF0000;
  --color-red-600: #DB0000;
  --color-red-700: #B20000;
  --color-red-800: #900000;
  --color-red-900: #760000;
  --color-red-950: #330000;
}

<!-- or the exact color, no config -->
<div class="bg-[#FF0000] text-[#000000]">…</div>