#90181C#90181C

#90181C is a dark, vivid red. Relative luminance 0.067; OKLCH L 42.4% C 0.155 H 25.6°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#90181C
RGB	rgb(144, 24, 28)
HSL	hsl(358, 71%, 33%)
HSV	hsv(358, 83%, 56%)
CMYK	cmyk(0%, 83.3%, 80.6%, 43.5%)
CIE-LAB	lab(31.04, 48.35, 30.61)
CIE-LCH	lch(31.04, 57.23, 32.34°)
OKLab	oklab(42.42% 0.1394 0.0667)
OKLCH	oklch(42.42% 0.155 25.6)
XYZ	xyz(12.0393, 6.6684, 1.7516)
Luminance	0.0667 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#90181C #18908C

analogous

#901858 #90181C #905018

triadic

#90181C #1C9018 #181C90

tetradic

#90181C #589018 #18908C #501890

square

#90181C #589018 #18908C #501890

split-complementary

#90181C #189050 #185890

monochromatic

#270708 #5C0F12 #90181C #C42126 #E04348

Accessibility & contrast

On white

9.00

#90181C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#90181C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #90181C

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

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

#3F391B

Deuteranopia (green-blind)

#5C5217

Tritanopia (blue-blind)

#9F001B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #90181c;
/* rgb */ color: rgb(144, 24, 28);
/* oklch */ color: oklch(42.4% 0.155 25.6);

Tailwind

colors: {
  custom: {
    50: '#b96358',
    500: '#90181c',
    950: '#000000',
  },
}

SCSS

$custom: #90181c;
$custom-light: #b96358;
$custom-dark: #000000;

JSON

{
  "hex": "#90181c",
  "rgb": {
    "r": 144,
    "g": 24,
    "b": 28
  },
  "hsl": {
    "h": 358,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.42424,
    "c": 0.15451,
    "h": 25.6
  },
  "luminance": 0.06666
}

Semantic roles & 50–950 ramp

primary

#90181C

secondary

#43C0BC

accent

#EEE83A

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130603

muted

#827A78

Preview Lab

Preview with #90181C

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

Preview Lab → · Contrast checker → · Palette generator →