#210500#210500

#210500 is a very dark, muted red. Relative luminance 0.004; OKLCH L 16.9% C 0.053 H 39.8°. Best body text is #FFFFFF at 19.33:1 contrast (WCAG AA passes).

Color values

HEX	#210500
RGB	rgb(33, 5, 0)
HSL	hsl(9, 100%, 6%)
HSV	hsv(9, 100%, 13%)
CMYK	cmyk(0%, 84.8%, 100%, 87.1%)
CIE-LAB	lab(3.90, 11.10, 6.05)
CIE-LCH	lch(3.90, 12.64, 28.58°)
OKLab	oklab(16.85% 0.0408 0.034)
OKLCH	oklch(16.85% 0.053 39.8)
XYZ	xyz(0.6816, 0.4320, 0.0475)
Luminance	0.0043 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#210500 #001C21

analogous

#21000C #210500 #211600

triadic

#210500 #002105 #050021

tetradic

#210500 #0C2100 #001C21 #160021

square

#210500 #0C2100 #001C21 #160021

split-complementary

#210500 #002116 #000C21

monochromatic

#1F0500 #1F0500 #210500 #5E0E00 #9B1800

Accessibility & contrast

On white

19.33

#210500 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#210500 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #210500

19.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##210500	#FFFFFF	#000000	##FFFFFF
##210500	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)

#0D0A00

Deuteranopia (green-blind)

#141000

Tritanopia (blue-blind)

#260104

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #210500;
/* rgb */ color: rgb(33, 5, 0);
/* oklch */ color: oklch(16.9% 0.053 39.8);

Tailwind

colors: {
  custom: {
    50: '#5c4947',
    500: '#210500',
    950: '#000000',
  },
}

SCSS

$custom: #210500;
$custom-light: #5c4947;
$custom-dark: #000000;

JSON

{
  "hex": "#210500",
  "rgb": {
    "r": 33,
    "g": 5,
    "b": 0
  },
  "hsl": {
    "h": 9.091,
    "s": 100,
    "l": 6.471
  },
  "oklch": {
    "l": 0.16853,
    "c": 0.05313,
    "h": 39.8
  },
  "luminance": 0.00432
}

Semantic roles & 50–950 ramp

primary

#210500

secondary

#135D6A

accent

#DFFF29

background

#F5F4F3

surface

#E9E6E5

border

#C5C2C1

text

#040000

muted

#797777

Preview Lab

Preview with #210500

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

Preview Lab → · Contrast checker → · Palette generator →