#42100C#42100C

#42100C is a dark, moderate red. Relative luminance 0.016; OKLCH L 25.9% C 0.078 H 28.3°. Best body text is #FFFFFF at 16.02:1 contrast (WCAG AA passes).

Color values

HEX	#42100C
RGB	rgb(66, 16, 12)
HSL	hsl(4, 69%, 15%)
HSV	hsv(4, 82%, 26%)
CMYK	cmyk(0%, 75.8%, 81.8%, 74.1%)
CIE-LAB	lab(12.96, 23.85, 14.95)
CIE-LCH	lch(12.96, 28.15, 32.08°)
OKLab	oklab(25.88% 0.0688 0.0371)
OKLCH	oklch(25.88% 0.078 28.3)
XYZ	xyz(2.4987, 1.5557, 0.5165)
Luminance	0.0155 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42100C #0C3E42

analogous

#420C23 #42100C #422B0C

triadic

#42100C #0C4210 #100C42

tetradic

#42100C #23420C #0C3E42 #2B0C42

square

#42100C #23420C #0C3E42 #2B0C42

split-complementary

#42100C #0C422B #0C2342

monochromatic

#1A0605 #1A0605 #42100C #761D15 #AA291F

Accessibility & contrast

On white

16.02

#42100C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#42100C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42100C

16.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42100C	#FFFFFF	#000000	##FFFFFF
##42100C	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)

#1E1B0B

Deuteranopia (green-blind)

#2A250A

Tritanopia (blue-blind)

#49040F

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #42100c;
/* rgb */ color: rgb(66, 16, 12);
/* oklch */ color: oklch(25.9% 0.078 28.3);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#42100c",
  "rgb": {
    "r": 66,
    "g": 16,
    "b": 12
  },
  "hsl": {
    "h": 4.444,
    "s": 69.231,
    "l": 15.294
  },
  "oklch": {
    "l": 0.25878,
    "c": 0.07816,
    "h": 28.3
  },
  "luminance": 0.01555
}

Semantic roles & 50–950 ramp

primary

#42100C

secondary

#2C787E

accent

#DFEC3C

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #42100C

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

Preview Lab → · Contrast checker → · Palette generator →