#210400#210400

#210400 is a very dark, muted red. Relative luminance 0.004; OKLCH L 16.6% C 0.055 H 37.6°. Best body text is #FFFFFF at 19.41:1 contrast (WCAG AA passes).

Color values

HEX	#210400
RGB	rgb(33, 4, 0)
HSL	hsl(7, 100%, 6%)
HSV	hsv(7, 100%, 13%)
CMYK	cmyk(0%, 87.9%, 100%, 87.1%)
CIE-LAB	lab(3.71, 11.50, 5.76)
CIE-LCH	lch(3.71, 12.86, 26.61°)
OKLab	oklab(16.61% 0.0435 0.0335)
OKLCH	oklch(16.61% 0.055 37.6)
XYZ	xyz(0.6707, 0.4103, 0.0439)
Luminance	0.0041 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#210400 #001D21

analogous

#21000D #210400 #211500

triadic

#210400 #002104 #040021

tetradic

#210400 #0D2100 #001D21 #150021

square

#210400 #0D2100 #001D21 #150021

split-complementary

#210400 #002115 #000D21

monochromatic

#1F0400 #1F0400 #210400 #5E0B00 #9B1300

Accessibility & contrast

On white

19.41

#210400 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#210400 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #210400

19.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##210400	#FFFFFF	#000000	##FFFFFF
##210400	1.00	19.41	1.08	19.41
#FFFFFF	19.41	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C0900

Deuteranopia (green-blind)

#131000

Tritanopia (blue-blind)

#260003

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #210400;
/* rgb */ color: rgb(33, 4, 0);
/* oklch */ color: oklch(16.6% 0.055 37.6);

Tailwind

colors: {
  custom: {
    50: '#5c4847',
    500: '#210400',
    950: '#000000',
  },
}

SCSS

$custom: #210400;
$custom-light: #5c4847;
$custom-dark: #000000;

JSON

{
  "hex": "#210400",
  "rgb": {
    "r": 33,
    "g": 4,
    "b": 0
  },
  "hsl": {
    "h": 7.273,
    "s": 100,
    "l": 6.471
  },
  "oklch": {
    "l": 0.16611,
    "c": 0.05486,
    "h": 37.6
  },
  "luminance": 0.0041
}

Semantic roles & 50–950 ramp

primary

#210400

secondary

#135F6A

accent

#E5FF29

background

#F5F4F3

surface

#E9E6E5

border

#C5C2C1

text

#040000

muted

#797777

Preview Lab

Preview with #210400

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

Preview Lab → · Contrast checker → · Palette generator →