#42100B#42100B

#42100B is a dark, moderate red. Relative luminance 0.016; OKLCH L 25.9% C 0.078 H 29.2°. Best body text is #FFFFFF at 16.02:1 contrast (WCAG AA passes).

Color values

HEX	#42100B
RGB	rgb(66, 16, 11)
HSL	hsl(5, 71%, 15%)
HSV	hsv(5, 83%, 26%)
CMYK	cmyk(0%, 75.8%, 83.3%, 74.1%)
CIE-LAB	lab(12.94, 23.80, 15.38)
CIE-LCH	lch(12.94, 28.33, 32.87°)
OKLab	oklab(25.86% 0.0684 0.0383)
OKLCH	oklch(25.86% 0.078 29.2)
XYZ	xyz(2.4927, 1.5534, 0.4851)
Luminance	0.0155 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42100B #0B3D42

analogous

#420B21 #42100B #422C0B

triadic

#42100B #0B4210 #100B42

tetradic

#42100B #21420B #0B3D42 #2C0B42

square

#42100B #21420B #0B3D42 #2C0B42

split-complementary

#42100B #0B422C #0B2142

monochromatic

#1A0604 #1A0604 #42100B #761D14 #AB291C

Accessibility & contrast

On white

16.02

#42100B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#42100B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42100B

16.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42100B	#FFFFFF	#000000	##FFFFFF
##42100B	1.00	16.02	1.31	16.02
#FFFFFF	16.02	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E1B0A

Deuteranopia (green-blind)

#2B2509

Tritanopia (blue-blind)

#49030F

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #42100b;
/* rgb */ color: rgb(66, 16, 11);
/* oklch */ color: oklch(25.9% 0.078 29.2);

Tailwind

colors: {
  custom: {
    50: '#7b514b',
    500: '#42100b',
    950: '#000000',
  },
}

SCSS

$custom: #42100b;
$custom-light: #7b514b;
$custom-dark: #000000;

JSON

{
  "hex": "#42100b",
  "rgb": {
    "r": 66,
    "g": 16,
    "b": 11
  },
  "hsl": {
    "h": 5.455,
    "s": 71.429,
    "l": 15.098
  },
  "oklch": {
    "l": 0.25862,
    "c": 0.07837,
    "h": 29.2
  },
  "luminance": 0.01553
}

Semantic roles & 50–950 ramp

primary

#42100B

secondary

#2A777F

accent

#DEEE3A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #42100B

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

Preview Lab → · Contrast checker → · Palette generator →