#210004#210004

#210004 is a very dark, moderate red. Relative luminance 0.003; OKLCH L 15.7% C 0.063 H 16.9°. Best body text is #FFFFFF at 19.69:1 contrast (WCAG AA passes).

Color values

HEX	#210004
RGB	rgb(33, 0, 4)
HSL	hsl(353, 100%, 6%)
HSV	hsv(353, 100%, 13%)
CMYK	cmyk(0%, 100%, 87.9%, 87.1%)
CIE-LAB	lab(3.00, 13.66, 3.10)
CIE-LCH	lch(3.00, 14.01, 12.80°)
OKLab	oklab(15.72% 0.0602 0.0183)
OKLCH	oklch(15.72% 0.063 16.9)
XYZ	xyz(0.6492, 0.3322, 0.1448)
Luminance	0.0033 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#210004 #00211D

analogous

#210015 #210004 #210D00

triadic

#210004 #042100 #000421

tetradic

#210004 #152100 #00211D #0D0021

square

#210004 #152100 #00211D #0D0021

split-complementary

#210004 #00210D #001521

monochromatic

#1F0004 #1F0004 #210004 #5E000B #9B0013

Accessibility & contrast

On white

19.69

#210004 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#210004 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #210004

19.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##210004	#FFFFFF	#000000	##FFFFFF
##210004	1.00	19.69	1.07	19.69
#FFFFFF	19.69	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#070604

Deuteranopia (green-blind)

#100E03

Tritanopia (blue-blind)

#250001

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #210004;
/* rgb */ color: rgb(33, 0, 4);
/* oklch */ color: oklch(15.7% 0.063 16.9);

Tailwind

colors: {
  custom: {
    50: '#5c4648',
    500: '#210004',
    950: '#000000',
  },
}

SCSS

$custom: #210004;
$custom-light: #5c4648;
$custom-dark: #000000;

JSON

{
  "hex": "#210004",
  "rgb": {
    "r": 33,
    "g": 0,
    "b": 4
  },
  "hsl": {
    "h": 352.727,
    "s": 100,
    "l": 6.471
  },
  "oklch": {
    "l": 0.1572,
    "c": 0.06292,
    "h": 16.9
  },
  "luminance": 0.00332
}

Semantic roles & 50–950 ramp

primary

#210004

secondary

#136A5F

accent

#FFE529

background

#F5F3F4

surface

#E9E5E6

border

#C5C1C2

text

#040000

muted

#797777

Preview Lab

Preview with #210004

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

Preview Lab → · Contrast checker → · Palette generator →