#90181D#90181D

#90181D is a dark, vivid red. Relative luminance 0.067; OKLCH L 42.4% C 0.154 H 25.2°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#90181D
RGB	rgb(144, 24, 29)
HSL	hsl(358, 71%, 33%)
HSV	hsv(358, 83%, 56%)
CMYK	cmyk(0%, 83.3%, 79.9%, 43.5%)
CIE-LAB	lab(31.05, 48.38, 30.03)
CIE-LCH	lch(31.05, 56.94, 31.82°)
OKLab	oklab(42.44% 0.1397 0.0658)
OKLCH	oklch(42.44% 0.154 25.2)
XYZ	xyz(12.0515, 6.6732, 1.8157)
Luminance	0.0667 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#90181D #18908B

analogous

#901859 #90181D #904F18

triadic

#90181D #1D9018 #181D90

tetradic

#90181D #599018 #18908B #4F1890

square

#90181D #599018 #18908B #4F1890

split-complementary

#90181D #18904F #185990

monochromatic

#270708 #5C0F12 #90181D #C42128 #E04349

Accessibility & contrast

On white

9.00

#90181D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#90181D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #90181D

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##90181D	#FFFFFF	#000000	##FFFFFF
##90181D	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)

#3F391C

Deuteranopia (green-blind)

#5C5218

Tritanopia (blue-blind)

#9F001C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #90181d;
/* rgb */ color: rgb(144, 24, 29);
/* oklch */ color: oklch(42.4% 0.154 25.2);

Tailwind

colors: {
  custom: {
    50: '#b96359',
    500: '#90181d',
    950: '#000000',
  },
}

SCSS

$custom: #90181d;
$custom-light: #b96359;
$custom-dark: #000000;

JSON

{
  "hex": "#90181d",
  "rgb": {
    "r": 144,
    "g": 24,
    "b": 29
  },
  "hsl": {
    "h": 357.5,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.42436,
    "c": 0.1544,
    "h": 25.2
  },
  "luminance": 0.06671
}

Semantic roles & 50–950 ramp

primary

#90181D

secondary

#43C0BB

accent

#EEE73A

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130603

muted

#827A78

Preview Lab

Preview with #90181D

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

Preview Lab → · Contrast checker → · Palette generator →