#90231B#90231B

#90231B is a dark, vivid red. Relative luminance 0.072; OKLCH L 43.3% C 0.146 H 28.8°. Best body text is #FFFFFF at 8.60:1 contrast (WCAG AA passes).

Color values

HEX	#90231B
RGB	rgb(144, 35, 27)
HSL	hsl(4, 68%, 34%)
HSV	hsv(4, 81%, 56%)
CMYK	cmyk(0%, 75.7%, 81.3%, 43.5%)
CIE-LAB	lab(32.29, 44.79, 32.48)
CIE-LCH	lch(32.29, 55.33, 35.95°)
OKLab	oklab(43.35% 0.1279 0.0705)
OKLCH	oklch(43.35% 0.146 28.8)
XYZ	xyz(12.3019, 7.2124, 1.7811)
Luminance	0.0721 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#90231B #1B8890

analogous

#901B4D #90231B #905D1B

triadic

#90231B #1B9023 #231B90

tetradic

#90231B #4D901B #1B8890 #5D1B90

square

#90231B #4D901B #1B8890 #5D1B90

split-complementary

#90231B #1B905D #1B4D90

monochromatic

#290A08 #5C1611 #90231B #C43025 #DD5349

Accessibility & contrast

On white

8.60

#90231B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#90231B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #90231B

8.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##90231B	#FFFFFF	#000000	##FFFFFF
##90231B	1.00	8.60	2.44	8.60
#FFFFFF	8.60	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#443D19

Deuteranopia (green-blind)

#5F5516

Tritanopia (blue-blind)

#9F0022

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #90231b;
/* rgb */ color: rgb(144, 35, 27);
/* oklch */ color: oklch(43.3% 0.146 28.8);

Tailwind

colors: {
  custom: {
    50: '#b96758',
    500: '#90231b',
    950: '#000000',
  },
}

SCSS

$custom: #90231b;
$custom-light: #b96758;
$custom-dark: #000000;

JSON

{
  "hex": "#90231b",
  "rgb": {
    "r": 144,
    "g": 35,
    "b": 27
  },
  "hsl": {
    "h": 4.103,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.43348,
    "c": 0.14607,
    "h": 28.8
  },
  "luminance": 0.0721
}

Semantic roles & 50–950 ramp

primary

#90231B

secondary

#48B7BF

accent

#DFEB3D

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130603

muted

#827A78

Preview Lab

Preview with #90231B

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

Preview Lab → · Contrast checker → · Palette generator →