#2B100A#2B100A

#2B100A is a very dark, muted red. Relative luminance 0.009; OKLCH L 21.4% C 0.047 H 33.8°. Best body text is #FFFFFF at 17.78:1 contrast (WCAG AA passes).

Color values

HEX	#2B100A
RGB	rgb(43, 16, 10)
HSL	hsl(11, 62%, 10%)
HSV	hsv(11, 77%, 17%)
CMYK	cmyk(0%, 62.8%, 76.7%, 83.1%)
CIE-LAB	lab(8.18, 13.35, 8.43)
CIE-LCH	lch(8.18, 15.79, 32.28°)
OKLab	oklab(21.35% 0.0387 0.0259)
OKLCH	oklch(21.35% 0.047 33.8)
XYZ	xyz(1.2364, 0.9062, 0.3969)
Luminance	0.0091 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B100A #0A252B

analogous

#2B0A14 #2B100A #2B200A

triadic

#2B100A #0A2B10 #100A2B

tetradic

#2B100A #142B0A #0A252B #200A2B

square

#2B100A #142B0A #0A252B #200A2B

split-complementary

#2B100A #0A2B20 #0A142B

monochromatic

#190906 #190906 #2B100A #5D2216 #8E3521

Accessibility & contrast

On white

17.78

#2B100A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#2B100A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B100A

17.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B100A	#FFFFFF	#000000	##FFFFFF
##2B100A	1.00	17.78	1.18	17.78
#FFFFFF	17.78	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#171409

Deuteranopia (green-blind)

#1E1A09

Tritanopia (blue-blind)

#300B0F

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #2b100a;
/* rgb */ color: rgb(43, 16, 10);
/* oklch */ color: oklch(21.4% 0.047 33.8);

Tailwind

colors: {
  custom: {
    50: '#664f4b',
    500: '#2b100a',
    950: '#000000',
  },
}

SCSS

$custom: #2b100a;
$custom-light: #664f4b;
$custom-dark: #000000;

JSON

{
  "hex": "#2b100a",
  "rgb": {
    "r": 43,
    "g": 16,
    "b": 10
  },
  "hsl": {
    "h": 10.909,
    "s": 62.264,
    "l": 10.392
  },
  "oklch": {
    "l": 0.21354,
    "c": 0.04662,
    "h": 33.8
  },
  "luminance": 0.00906
}

Semantic roles & 50–950 ramp

primary

#2B100A

secondary

#295C68

accent

#C8E542

background

#F6F4F4

surface

#EBE7E7

border

#C6C3C3

text

#060101

muted

#7A7777

Preview Lab

Preview with #2B100A

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

Preview Lab → · Contrast checker → · Palette generator →