#28100B#28100B

#28100B is a very dark, muted red. Relative luminance 0.008; OKLCH L 20.8% C 0.042 H 33.0°. Best body text is #FFFFFF at 17.96:1 contrast (WCAG AA passes).

Color values

HEX	#28100B
RGB	rgb(40, 16, 11)
HSL	hsl(10, 57%, 10%)
HSV	hsv(10, 73%, 16%)
CMYK	cmyk(0%, 60%, 72.5%, 84.3%)
CIE-LAB	lab(7.64, 11.91, 7.16)
CIE-LCH	lch(7.64, 13.89, 31.01°)
OKLab	oklab(20.83% 0.0349 0.0227)
OKLCH	oklch(20.83% 0.042 33)
XYZ	xyz(1.1209, 0.8460, 0.4208)
Luminance	0.0085 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28100B #0B2328

analogous

#280B14 #28100B #281F0B

triadic

#28100B #0B2810 #100B28

tetradic

#28100B #14280B #0B2328 #1F0B28

square

#28100B #14280B #0B2328 #1F0B28

split-complementary

#28100B #0B281F #0B1428

monochromatic

#180A07 #180A07 #28100B #582318 #883625

Accessibility & contrast

On white

17.96

#28100B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#28100B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28100B

17.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28100B	#FFFFFF	#000000	##FFFFFF
##28100B	1.00	17.96	1.17	17.96
#FFFFFF	17.96	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140B

Deuteranopia (green-blind)

#1C190B

Tritanopia (blue-blind)

#2C0C0F

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #28100b;
/* rgb */ color: rgb(40, 16, 11);
/* oklch */ color: oklch(20.8% 0.042 33.0);

Tailwind

colors: {
  custom: {
    50: '#634e4b',
    500: '#28100b',
    950: '#000000',
  },
}

SCSS

$custom: #28100b;
$custom-light: #634e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#28100b",
  "rgb": {
    "r": 40,
    "g": 16,
    "b": 11
  },
  "hsl": {
    "h": 10.345,
    "s": 56.863,
    "l": 10
  },
  "oklch": {
    "l": 0.20827,
    "c": 0.04163,
    "h": 33
  },
  "luminance": 0.00846
}

Semantic roles & 50–950 ramp

primary

#28100B

secondary

#2B5A64

accent

#C6E048

background

#F6F4F4

surface

#EBE7E7

border

#C6C3C3

text

#050101

muted

#7A7777

Preview Lab

Preview with #28100B

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

Preview Lab → · Contrast checker → · Palette generator →