#42101B#42101B

#42101B is a dark, moderate red. Relative luminance 0.016; OKLCH L 26.2% C 0.077 H 11.1°. Best body text is #FFFFFF at 15.89:1 contrast (WCAG AA passes).

Color values

HEX	#42101B
RGB	rgb(66, 16, 27)
HSL	hsl(347, 61%, 16%)
HSV	hsv(347, 76%, 26%)
CMYK	cmyk(0%, 75.8%, 59.1%, 74.1%)
CIE-LAB	lab(13.28, 25.02, 5.87)
CIE-LCH	lch(13.28, 25.70, 13.20°)
OKLab	oklab(26.22% 0.0758 0.0149)
OKLCH	oklch(26.22% 0.077 11.1)
XYZ	xyz(2.6301, 1.6083, 1.2086)
Luminance	0.0161 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42101B #104237

analogous

#421034 #42101B #421E10

triadic

#42101B #1B4210 #101B42

tetradic

#42101B #344210 #104237 #1E1042

square

#42101B #344210 #104237 #1E1042

split-complementary

#42101B #10421E #103442

monochromatic

#19060A #19060A #42101B #731C2F #A52843

Accessibility & contrast

On white

15.89

#42101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#42101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42101B

15.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42101B	#FFFFFF	#000000	##FFFFFF
##42101B	1.00	15.89	1.32	15.89
#FFFFFF	15.89	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C1C1B

Deuteranopia (green-blind)

#29261A

Tritanopia (blue-blind)

#490714

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #42101b;
/* rgb */ color: rgb(66, 16, 27);
/* oklch */ color: oklch(26.2% 0.077 11.1);

Tailwind

colors: {
  custom: {
    50: '#7a5257',
    500: '#42101b',
    950: '#000000',
  },
}

SCSS

$custom: #42101b;
$custom-light: #7a5257;
$custom-dark: #000000;

JSON

{
  "hex": "#42101b",
  "rgb": {
    "r": 66,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 346.8,
    "s": 60.976,
    "l": 16.078
  },
  "oklch": {
    "l": 0.26224,
    "c": 0.07723,
    "h": 11.1
  },
  "luminance": 0.01608
}

Semantic roles & 50–950 ramp

primary

#42101B

secondary

#327C6C

accent

#E4C144

background

#F7F4F5

surface

#EEE7E9

border

#C9C3C5

text

#0A0203

muted

#7C7878

Preview Lab

Preview with #42101B

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

Preview Lab → · Contrast checker → · Palette generator →