#21050B#21050B

#21050B is a very dark, muted red. Relative luminance 0.005; OKLCH L 17.2% C 0.050 H 9.5°. Best body text is #FFFFFF at 19.24:1 contrast (WCAG AA passes).

Color values

HEX	#21050B
RGB	rgb(33, 5, 11)
HSL	hsl(347, 74%, 7%)
HSV	hsv(347, 85%, 13%)
CMYK	cmyk(0%, 84.8%, 66.7%, 87.1%)
CIE-LAB	lab(4.12, 12.63, 1.88)
CIE-LCH	lch(4.12, 12.77, 8.44°)
OKLab	oklab(17.22% 0.0494 0.0083)
OKLCH	oklch(17.22% 0.05 9.5)
XYZ	xyz(0.7419, 0.4561, 0.3655)
Luminance	0.0046 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21050B #05211B

analogous

#210519 #21050B #210D05

triadic

#21050B #0B2105 #050B21

tetradic

#21050B #192105 #05211B #0D0521

square

#21050B #192105 #05211B #0D0521

split-complementary

#21050B #05210D #051921

monochromatic

#1B0409 #1B0409 #21050B #560D1D #8B152E

Accessibility & contrast

On white

19.24

#21050B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#21050B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21050B

19.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21050B	#FFFFFF	#000000	##FFFFFF
##21050B	1.00	19.24	1.09	19.24
#FFFFFF	19.24	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B0B0B

Deuteranopia (green-blind)

#12110A

Tritanopia (blue-blind)

#250207

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #21050b;
/* rgb */ color: rgb(33, 5, 11);
/* oklch */ color: oklch(17.2% 0.050 9.5);

Tailwind

colors: {
  custom: {
    50: '#5c484c',
    500: '#21050b',
    950: '#000000',
  },
}

SCSS

$custom: #21050b;
$custom-light: #5c484c;
$custom-dark: #000000;

JSON

{
  "hex": "#21050b",
  "rgb": {
    "r": 33,
    "g": 5,
    "b": 11
  },
  "hsl": {
    "h": 347.143,
    "s": 73.684,
    "l": 7.451
  },
  "oklch": {
    "l": 0.17223,
    "c": 0.05007,
    "h": 9.5
  },
  "luminance": 0.00456
}

Semantic roles & 50–950 ramp

primary

#21050B

secondary

#1F6254

accent

#F0C937

background

#F5F4F4

surface

#E9E6E7

border

#C5C2C3

text

#040001

muted

#797777

Preview Lab

Preview with #21050B

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

Preview Lab → · Contrast checker → · Palette generator →