#AD251B#AD251B

#AD251B is a mid, vivid red. Relative luminance 0.103; OKLCH L 48.9% C 0.174 H 29.3°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX	#AD251B
RGB	rgb(173, 37, 27)
HSL	hsl(4, 73%, 39%)
HSV	hsv(4, 84%, 68%)
CMYK	cmyk(0%, 78.6%, 84.4%, 32.2%)
CIE-LAB	lab(38.36, 53.34, 40.34)
CIE-LCH	lch(38.36, 66.88, 37.10°)
OKLab	oklab(48.91% 0.1515 0.0849)
OKLCH	oklch(48.91% 0.174 29.3)
XYZ	xyz(18.0952, 10.2894, 2.0700)
Luminance	0.1029 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AD251B #1BA3AD

analogous

#AD1B5A #AD251B #AD6E1B

triadic

#AD251B #1BAD25 #251BAD

tetradic

#AD251B #5AAD1B #1BA3AD #6E1BAD

square

#AD251B #5AAD1B #1BA3AD #6E1BAD

split-complementary

#AD251B #1BAD6E #1B5AAD

monochromatic

#430E0A #781A13 #AD251B #DD3428 #E6665D

Accessibility & contrast

On white

6.87

#AD251B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#AD251B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AD251B

6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AD251B	#FFFFFF	#000000	##FFFFFF
##AD251B	1.00	6.87	3.06	6.87
#FFFFFF	6.87	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#504718

Deuteranopia (green-blind)

#726513

Tritanopia (blue-blind)

#BF0025

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #ad251b;
/* rgb */ color: rgb(173, 37, 27);
/* oklch */ color: oklch(48.9% 0.174 29.3);

Tailwind

colors: {
  custom: {
    50: '#cf6c59',
    500: '#ad251b',
    950: '#000000',
  },
}

SCSS

$custom: #ad251b;
$custom-light: #cf6c59;
$custom-dark: #000000;

JSON

{
  "hex": "#ad251b",
  "rgb": {
    "r": 173,
    "g": 37,
    "b": 27
  },
  "hsl": {
    "h": 4.11,
    "s": 73,
    "l": 39.216
  },
  "oklch": {
    "l": 0.48913,
    "c": 0.17363,
    "h": 29.3
  },
  "luminance": 0.10287
}

Semantic roles & 50–950 ramp

primary

#AD251B

secondary

#5AC2CA

accent

#E3F038

background

#FEF6F5

surface

#FCECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #AD251B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →