#B31E21#B31E21

#B31E21 is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.6% C 0.183 H 26.4°. Best body text is #FFFFFF at 6.72:1 contrast (WCAG AA passes).

Color values

HEX	#B31E21
RGB	rgb(179, 30, 33)
HSL	hsl(359, 71%, 41%)
HSV	hsv(359, 83%, 70%)
CMYK	cmyk(0%, 83.2%, 81.6%, 29.8%)
CIE-LAB	lab(38.94, 57.23, 38.10)
CIE-LCH	lch(38.94, 68.75, 33.65°)
OKLab	oklab(49.58% 0.1642 0.0816)
OKLCH	oklch(49.58% 0.183 26.4)
XYZ	xyz(19.3316, 10.6252, 2.4716)
Luminance	0.1062 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E21 #1EB3B0

analogous

#B31E6B #B31E21 #B3651E

triadic

#B31E21 #21B31E #1E21B3

tetradic

#B31E21 #6BB31E #1EB3B0 #651EB3

square

#B31E21 #6BB31E #1EB3B0 #651EB3

split-complementary

#B31E21 #1EB365 #1E6BB3

monochromatic

#4A0C0E #7F1517 #B31E21 #DD3235 #E56669

Accessibility & contrast

On white

6.72

#B31E21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B31E21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E21

6.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E21	#FFFFFF	#000000	##FFFFFF
##B31E21	1.00	6.72	3.12	6.72
#FFFFFF	6.72	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F471F

Deuteranopia (green-blind)

#746719

Tritanopia (blue-blind)

#C60022

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31e21;
/* rgb */ color: rgb(179, 30, 33);
/* oklch */ color: oklch(49.6% 0.183 26.4);

Tailwind

colors: {
  custom: {
    50: '#d46b5d',
    500: '#b31e21',
    950: '#000000',
  },
}

SCSS

$custom: #b31e21;
$custom-light: #d46b5d;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e21",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 33
  },
  "hsl": {
    "h": 358.792,
    "s": 71.292,
    "l": 40.98
  },
  "oklch": {
    "l": 0.49579,
    "c": 0.18333,
    "h": 26.4
  },
  "luminance": 0.10622
}

Semantic roles & 50–950 ramp

primary

#B31E21

secondary

#62CBC8

accent

#EEEA3A

background

#FEF6F5

surface

#FCECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #B31E21

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

Preview Lab → · Contrast checker → · Palette generator →