#901B23#901B23

#901B23 is a dark, vivid red. Relative luminance 0.068; OKLCH L 42.7% C 0.152 H 23.4°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#901B23
RGB	rgb(144, 27, 35)
HSL	hsl(356, 68%, 34%)
HSV	hsv(356, 81%, 56%)
CMYK	cmyk(0%, 81.3%, 75.7%, 43.5%)
CIE-LAB	lab(31.43, 47.76, 26.76)
CIE-LCH	lch(31.43, 54.74, 29.26°)
OKLab	oklab(42.74% 0.1391 0.0603)
OKLCH	oklch(42.74% 0.152 23.4)
XYZ	xyz(12.1983, 6.8364, 2.2671)
Luminance	0.0683 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#901B23 #1B9088

analogous

#901B5D #901B23 #904D1B

triadic

#901B23 #23901B #1B2390

tetradic

#901B23 #5D901B #1B9088 #4D1B90

square

#901B23 #5D901B #1B9088 #4D1B90

split-complementary

#901B23 #1B904D #1B5D90

monochromatic

#29080A #5C1116 #901B23 #C42530 #DD4953

Accessibility & contrast

On white

8.87

#901B23 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#901B23 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #901B23

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##901B23	#FFFFFF	#000000	##FFFFFF
##901B23	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#403A22

Deuteranopia (green-blind)

#5C531F

Tritanopia (blue-blind)

#9F001F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #901b23;
/* rgb */ color: rgb(144, 27, 35);
/* oklch */ color: oklch(42.7% 0.152 23.4);

Tailwind

colors: {
  custom: {
    50: '#b9645e',
    500: '#901b23',
    950: '#000000',
  },
}

SCSS

$custom: #901b23;
$custom-light: #b9645e;
$custom-dark: #000000;

JSON

{
  "hex": "#901b23",
  "rgb": {
    "r": 144,
    "g": 27,
    "b": 35
  },
  "hsl": {
    "h": 355.897,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.42743,
    "c": 0.15161,
    "h": 23.4
  },
  "luminance": 0.06835
}

Semantic roles & 50–950 ramp

primary

#901B23

secondary

#48BFB7

accent

#EBDF3D

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130604

muted

#827A79

Preview Lab

Preview with #901B23

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

Preview Lab → · Contrast checker → · Palette generator →