#42100D#42100D

#42100D is a dark, moderate red. Relative luminance 0.016; OKLCH L 25.9% C 0.078 H 27.3°. Best body text is #FFFFFF at 16.01:1 contrast (WCAG AA passes).

Color values

HEX	#42100D
RGB	rgb(66, 16, 13)
HSL	hsl(3, 67%, 15%)
HSV	hsv(3, 80%, 26%)
CMYK	cmyk(0%, 75.8%, 80.3%, 74.1%)
CIE-LAB	lab(12.97, 23.91, 14.51)
CIE-LCH	lch(12.97, 27.97, 31.25°)
OKLab	oklab(25.9% 0.0693 0.0358)
OKLCH	oklch(25.9% 0.078 27.3)
XYZ	xyz(2.5050, 1.5583, 0.5496)
Luminance	0.0156 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42100D #0D3F42

analogous

#420D24 #42100D #422A0D

triadic

#42100D #0D4210 #100D42

tetradic

#42100D #24420D #0D3F42 #2A0D42

square

#42100D #24420D #0D3F42 #2A0D42

split-complementary

#42100D #0D422A #0D2442

monochromatic

#1A0605 #1A0605 #42100D #751C17 #A82921

Accessibility & contrast

On white

16.01

#42100D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#42100D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42100D

16.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42100D	#FFFFFF	#000000	##FFFFFF
##42100D	1.00	16.01	1.31	16.01
#FFFFFF	16.01	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E1B0C

Deuteranopia (green-blind)

#2A250B

Tritanopia (blue-blind)

#490410

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #42100d;
/* rgb */ color: rgb(66, 16, 13);
/* oklch */ color: oklch(25.9% 0.078 27.3);

Tailwind

colors: {
  custom: {
    50: '#7b514c',
    500: '#42100d',
    950: '#000000',
  },
}

SCSS

$custom: #42100d;
$custom-light: #7b514c;
$custom-dark: #000000;

JSON

{
  "hex": "#42100d",
  "rgb": {
    "r": 66,
    "g": 16,
    "b": 13
  },
  "hsl": {
    "h": 3.396,
    "s": 67.089,
    "l": 15.49
  },
  "oklch": {
    "l": 0.25895,
    "c": 0.07796,
    "h": 27.3
  },
  "luminance": 0.01558
}

Semantic roles & 50–950 ramp

primary

#42100D

secondary

#2D797E

accent

#E0EA3E

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #42100D

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

Preview Lab → · Contrast checker → · Palette generator →