#21040A#21040A

#21040A is a very dark, muted red. Relative luminance 0.004; OKLCH L 17.0% C 0.052 H 10.0°. Best body text is #FFFFFF at 19.33:1 contrast (WCAG AA passes).

Color values

HEX	#21040A
RGB	rgb(33, 4, 10)
HSL	hsl(348, 78%, 7%)
HSV	hsv(348, 88%, 13%)
CMYK	cmyk(0%, 87.9%, 69.7%, 87.1%)
CIE-LAB	lab(3.90, 12.89, 1.98)
CIE-LCH	lch(3.90, 13.04, 8.72°)
OKLab	oklab(16.96% 0.0516 0.0091)
OKLCH	oklch(16.96% 0.052 10)
XYZ	xyz(0.7255, 0.4322, 0.3323)
Luminance	0.0043 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21040A #04211B

analogous

#210419 #21040A #210D04

triadic

#21040A #0A2104 #040A21

tetradic

#21040A #192104 #04211B #0D0421

square

#21040A #192104 #04211B #0D0421

split-complementary

#21040A #04210D #041921

monochromatic

#1B0308 #1B0308 #21040A #580B1B #8E112B

Accessibility & contrast

On white

19.33

#21040A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#21040A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21040A

19.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21040A	#FFFFFF	#000000	##FFFFFF
##21040A	1.00	19.33	1.09	19.33
#FFFFFF	19.33	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A0A0A

Deuteranopia (green-blind)

#121009

Tritanopia (blue-blind)

#250106

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #21040a;
/* rgb */ color: rgb(33, 4, 10);
/* oklch */ color: oklch(17.0% 0.052 10.0);

Tailwind

colors: {
  custom: {
    50: '#5c484b',
    500: '#21040a',
    950: '#000000',
  },
}

SCSS

$custom: #21040a;
$custom-light: #5c484b;
$custom-dark: #000000;

JSON

{
  "hex": "#21040a",
  "rgb": {
    "r": 33,
    "g": 4,
    "b": 10
  },
  "hsl": {
    "h": 347.586,
    "s": 78.378,
    "l": 7.255
  },
  "oklch": {
    "l": 0.16958,
    "c": 0.05237,
    "h": 10
  },
  "luminance": 0.00432
}

Semantic roles & 50–950 ramp

primary

#21040A

secondary

#1D6455

accent

#F5CD33

background

#F5F4F4

surface

#E9E6E7

border

#C5C2C3

text

#040001

muted

#797777

Preview Lab

Preview with #21040A

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

Preview Lab → · Contrast checker → · Palette generator →