#42151B#42151B

#42151B is a dark, moderate red. Relative luminance 0.018; OKLCH L 27.0% C 0.070 H 15.1°. Best body text is #FFFFFF at 15.50:1 contrast (WCAG AA passes).

Color values

HEX	#42151B
RGB	rgb(66, 21, 27)
HSL	hsl(352, 52%, 17%)
HSV	hsv(352, 68%, 26%)
CMYK	cmyk(0%, 68.2%, 59.1%, 74.1%)
CIE-LAB	lab(14.25, 22.40, 7.21)
CIE-LCH	lch(14.25, 23.53, 17.84°)
OKLab	oklab(26.95% 0.0675 0.0182)
OKLCH	oklch(26.95% 0.07 15.1)
XYZ	xyz(2.7130, 1.7740, 1.2363)
Luminance	0.0177 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42151B #15423C

analogous

#421532 #42151B #422615

triadic

#42151B #1B4215 #151B42

tetradic

#42151B #324215 #15423C #261542

square

#42151B #324215 #15423C #261542

split-complementary

#42151B #154226 #153242

monochromatic

#170709 #170709 #42151B #70242E #9F3341

Accessibility & contrast

On white

15.50

#42151B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#42151B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42151B

15.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42151B	#FFFFFF	#000000	##FFFFFF
##42151B	1.00	15.50	1.35	15.50
#FFFFFF	15.50	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F1E1B

Deuteranopia (green-blind)

#2B281A

Tritanopia (blue-blind)

#490E17

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #42151b;
/* rgb */ color: rgb(66, 21, 27);
/* oklch */ color: oklch(27.0% 0.070 15.1);

Tailwind

colors: {
  custom: {
    50: '#7a5557',
    500: '#42151b',
    950: '#000000',
  },
}

SCSS

$custom: #42151b;
$custom-light: #7a5557;
$custom-dark: #000000;

JSON

{
  "hex": "#42151b",
  "rgb": {
    "r": 66,
    "g": 21,
    "b": 27
  },
  "hsl": {
    "h": 352,
    "s": 51.724,
    "l": 17.059
  },
  "oklch": {
    "l": 0.26951,
    "c": 0.06986,
    "h": 15.1
  },
  "luminance": 0.01774
}

Semantic roles & 50–950 ramp

primary

#42151B

secondary

#397A71

accent

#DBC84D

background

#F7F5F5

surface

#EEE9E9

border

#C9C5C5

text

#090303

muted

#7B7878

Preview Lab

Preview with #42151B

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

Preview Lab → · Contrast checker → · Palette generator →