#90181F#90181F

#90181F is a dark, vivid red. Relative luminance 0.067; OKLCH L 42.5% C 0.154 H 24.4°. Best body text is #FFFFFF at 8.99:1 contrast (WCAG AA passes).

Color values

HEX	#90181F
RGB	rgb(144, 24, 31)
HSL	hsl(357, 71%, 33%)
HSV	hsv(357, 83%, 56%)
CMYK	cmyk(0%, 83.3%, 78.5%, 43.5%)
CIE-LAB	lab(31.07, 48.46, 28.84)
CIE-LCH	lch(31.07, 56.39, 30.75°)
OKLab	oklab(42.46% 0.1404 0.0638)
OKLCH	oklch(42.46% 0.154 24.4)
XYZ	xyz(12.0770, 6.6834, 1.9502)
Luminance	0.0668 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#90181F #189089

analogous

#90185B #90181F #904D18

triadic

#90181F #1F9018 #181F90

tetradic

#90181F #5B9018 #189089 #4D1890

square

#90181F #5B9018 #189089 #4D1890

split-complementary

#90181F #18904D #185B90

monochromatic

#270708 #5C0F14 #90181F #C4212A #E0434C

Accessibility & contrast

On white

8.99

#90181F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#90181F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #90181F

8.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##90181F	#FFFFFF	#000000	##FFFFFF
##90181F	1.00	8.99	2.34	8.99
#FFFFFF	8.99	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F391E

Deuteranopia (green-blind)

#5C521A

Tritanopia (blue-blind)

#9F001C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #90181f;
/* rgb */ color: rgb(144, 24, 31);
/* oklch */ color: oklch(42.5% 0.154 24.4);

Tailwind

colors: {
  custom: {
    50: '#b9635b',
    500: '#90181f',
    950: '#000000',
  },
}

SCSS

$custom: #90181f;
$custom-light: #b9635b;
$custom-dark: #000000;

JSON

{
  "hex": "#90181f",
  "rgb": {
    "r": 144,
    "g": 24,
    "b": 31
  },
  "hsl": {
    "h": 356.5,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.42462,
    "c": 0.15419,
    "h": 24.4
  },
  "luminance": 0.06681
}

Semantic roles & 50–950 ramp

primary

#90181F

secondary

#43C0B9

accent

#EEE43A

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130604

muted

#827A79

Preview Lab

Preview with #90181F

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

Preview Lab → · Contrast checker → · Palette generator →