#B03731#B03731

#B03731 is a mid, vivid red. Relative luminance 0.122; OKLCH L 51.4% C 0.158 H 27.0°. Best body text is #FFFFFF at 6.11:1 contrast (WCAG AA passes).

Color values

HEX	#B03731
RGB	rgb(176, 55, 49)
HSL	hsl(3, 56%, 44%)
HSV	hsv(3, 72%, 69%)
CMYK	cmyk(0%, 68.8%, 72.2%, 31%)
CIE-LAB	lab(41.51, 48.64, 31.51)
CIE-LCH	lch(41.51, 57.95, 32.94°)
OKLab	oklab(51.45% 0.1409 0.0719)
OKLCH	oklch(51.45% 0.158 27)
XYZ	xyz(19.8272, 12.1871, 4.2135)
Luminance	0.1218 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03731 #31AAB0

analogous

#B0316B #B03731 #B07731

triadic

#B03731 #31B037 #3731B0

tetradic

#B03731 #6BB031 #31AAB0 #7731B0

square

#B03731 #6BB031 #31AAB0 #7731B0

split-complementary

#B03731 #31B077 #316BB0

monochromatic

#501916 #802824 #B03731 #CE5650 #DC8480

Accessibility & contrast

On white

6.11

#B03731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.44

#B03731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03731

6.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03731	#FFFFFF	#000000	##FFFFFF
##B03731	1.00	6.11	3.44	6.11
#FFFFFF	6.11	1.00	21.00	1.00
#000000	3.44	21.00	1.00	21.00
##FFFFFF	6.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59512F

Deuteranopia (green-blind)

#776C2D

Tritanopia (blue-blind)

#C21237

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #b03731;
/* rgb */ color: rgb(176, 55, 49);
/* oklch */ color: oklch(51.4% 0.158 27.0);

Tailwind

colors: {
  custom: {
    50: '#cf7569',
    500: '#b03731',
    950: '#000000',
  },
}

SCSS

$custom: #b03731;
$custom-light: #cf7569;
$custom-dark: #000000;

JSON

{
  "hex": "#b03731",
  "rgb": {
    "r": 176,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.835,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.51448,
    "c": 0.15813,
    "h": 27
  },
  "luminance": 0.12184
}

Semantic roles & 50–950 ramp

primary

#B03731

secondary

#78C1C5

accent

#D9E048

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B03731

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

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