#42100A#42100A

#42100A is a dark, moderate red. Relative luminance 0.016; OKLCH L 25.8% C 0.079 H 30.1°. Best body text is #FFFFFF at 16.03:1 contrast (WCAG AA passes).

Color values

HEX	#42100A
RGB	rgb(66, 16, 10)
HSL	hsl(6, 74%, 15%)
HSV	hsv(6, 85%, 26%)
CMYK	cmyk(0%, 75.8%, 84.8%, 74.1%)
CIE-LAB	lab(12.93, 23.75, 15.78)
CIE-LCH	lch(12.93, 28.51, 33.60°)
OKLab	oklab(25.85% 0.068 0.0394)
OKLCH	oklch(25.85% 0.079 30.1)
XYZ	xyz(2.4871, 1.5511, 0.4555)
Luminance	0.0155 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42100A #0A3C42

analogous

#420A20 #42100A #422C0A

triadic

#42100A #0A4210 #100A42

tetradic

#42100A #20420A #0A3C42 #2C0A42

square

#42100A #20420A #0A3C42 #2C0A42

split-complementary

#42100A #0A422C #0A2042

monochromatic

#1B0604 #1B0604 #42100A #771D12 #AC2A1A

Accessibility & contrast

On white

16.03

#42100A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#42100A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42100A

16.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42100A	#FFFFFF	#000000	##FFFFFF
##42100A	1.00	16.03	1.31	16.03
#FFFFFF	16.03	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E1A09

Deuteranopia (green-blind)

#2B2508

Tritanopia (blue-blind)

#49030F

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #42100a;
/* rgb */ color: rgb(66, 16, 10);
/* oklch */ color: oklch(25.8% 0.079 30.1);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#42100a",
  "rgb": {
    "r": 66,
    "g": 16,
    "b": 10
  },
  "hsl": {
    "h": 6.429,
    "s": 73.684,
    "l": 14.902
  },
  "oklch": {
    "l": 0.25847,
    "c": 0.07859,
    "h": 30.1
  },
  "luminance": 0.01551
}

Semantic roles & 50–950 ramp

primary

#42100A

secondary

#29767F

accent

#DDF037

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #42100A

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

Preview Lab → · Contrast checker → · Palette generator →