#90181B#90181B

#90181B is a dark, vivid red. Relative luminance 0.067; OKLCH L 42.4% C 0.155 H 26.0°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#90181B
RGB	rgb(144, 24, 27)
HSL	hsl(359, 71%, 33%)
HSV	hsv(359, 83%, 56%)
CMYK	cmyk(0%, 83.3%, 81.3%, 43.5%)
CIE-LAB	lab(31.03, 48.31, 31.20)
CIE-LCH	lch(31.03, 57.51, 32.85°)
OKLab	oklab(42.41% 0.139 0.0677)
OKLCH	oklch(42.41% 0.155 26)
XYZ	xyz(12.0275, 6.6637, 1.6896)
Luminance	0.0666 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#90181B #18908D

analogous

#901857 #90181B #905118

triadic

#90181B #1B9018 #181B90

tetradic

#90181B #579018 #18908D #511890

square

#90181B #579018 #18908D #511890

split-complementary

#90181B #189051 #185790

monochromatic

#270707 #5C0F11 #90181B #C42125 #E04347

Accessibility & contrast

On white

9.00

#90181B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#90181B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #90181B

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##90181B	#FFFFFF	#000000	##FFFFFF
##90181B	1.00	9.00	2.33	9.00
#FFFFFF	9.00	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F3819

Deuteranopia (green-blind)

#5C5215

Tritanopia (blue-blind)

#9F001B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #90181b;
/* rgb */ color: rgb(144, 24, 27);
/* oklch */ color: oklch(42.4% 0.155 26.0);

Tailwind

colors: {
  custom: {
    50: '#b96258',
    500: '#90181b',
    950: '#000000',
  },
}

SCSS

$custom: #90181b;
$custom-light: #b96258;
$custom-dark: #000000;

JSON

{
  "hex": "#90181b",
  "rgb": {
    "r": 144,
    "g": 24,
    "b": 27
  },
  "hsl": {
    "h": 358.5,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.42413,
    "c": 0.15462,
    "h": 26
  },
  "luminance": 0.06662
}

Semantic roles & 50–950 ramp

primary

#90181B

secondary

#43C0BD

accent

#EEEA3A

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130603

muted

#827A78

Preview Lab

Preview with #90181B

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

Preview Lab → · Contrast checker → · Palette generator →