#901B21#901B21

#901B21 is a dark, vivid red. Relative luminance 0.068; OKLCH L 42.7% C 0.152 H 24.3°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX	#901B21
RGB	rgb(144, 27, 33)
HSL	hsl(357, 68%, 34%)
HSV	hsv(357, 81%, 56%)
CMYK	cmyk(0%, 81.3%, 77.1%, 43.5%)
CIE-LAB	lab(31.40, 47.68, 27.97)
CIE-LCH	lch(31.40, 55.28, 30.40°)
OKLab	oklab(42.71% 0.1384 0.0625)
OKLCH	oklch(42.71% 0.152 24.3)
XYZ	xyz(12.1695, 6.8249, 2.1151)
Luminance	0.0682 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#901B21 #1B908A

analogous

#901B5B #901B21 #904F1B

triadic

#901B21 #21901B #1B2190

tetradic

#901B21 #5B901B #1B908A #4F1B90

square

#901B21 #5B901B #1B908A #4F1B90

split-complementary

#901B21 #1B904F #1B5B90

monochromatic

#290809 #5C1115 #901B21 #C4252D #DD4950

Accessibility & contrast

On white

8.88

#901B21 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#901B21 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #901B21

8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##901B21	#FFFFFF	#000000	##FFFFFF
##901B21	1.00	8.88	2.36	8.88
#FFFFFF	8.88	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#403A20

Deuteranopia (green-blind)

#5D531C

Tritanopia (blue-blind)

#9F001F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #901b21;
/* rgb */ color: rgb(144, 27, 33);
/* oklch */ color: oklch(42.7% 0.152 24.3);

Tailwind

colors: {
  custom: {
    50: '#b9645c',
    500: '#901b21',
    950: '#000000',
  },
}

SCSS

$custom: #901b21;
$custom-light: #b9645c;
$custom-dark: #000000;

JSON

{
  "hex": "#901b21",
  "rgb": {
    "r": 144,
    "g": 27,
    "b": 33
  },
  "hsl": {
    "h": 356.923,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.42714,
    "c": 0.15181,
    "h": 24.3
  },
  "luminance": 0.06823
}

Semantic roles & 50–950 ramp

primary

#901B21

secondary

#48BFB9

accent

#EBE23D

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130604

muted

#827A79

Preview Lab

Preview with #901B21

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

Preview Lab → · Contrast checker → · Palette generator →