#B31E1A#B31E1A

#B31E1A is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.5% C 0.184 H 28.2°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#B31E1A
RGB	rgb(179, 30, 26)
HSL	hsl(2, 75%, 40%)
HSV	hsv(2, 85%, 70%)
CMYK	cmyk(0%, 83.2%, 85.5%, 29.8%)
CIE-LAB	lab(38.88, 57.04, 41.78)
CIE-LCH	lch(38.88, 70.71, 36.22°)
OKLab	oklab(49.52% 0.1622 0.087)
OKLCH	oklch(49.52% 0.184 28.2)
XYZ	xyz(19.2436, 10.5900, 2.0079)
Luminance	0.1059 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E1A #1AAFB3

analogous

#B31A62 #B31E1A #B36B1A

triadic

#B31E1A #1AB31E #1E1AB3

tetradic

#B31E1A #62B31A #1AAFB3 #6B1AB3

square

#B31E1A #62B31A #1AAFB3 #6B1AB3

split-complementary

#B31E1A #1AB36B #1A62B3

monochromatic

#480C0A #7E1512 #B31E1A #E02F2A #E86360

Accessibility & contrast

On white

6.74

#B31E1A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B31E1A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E1A

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E1A	#FFFFFF	#000000	##FFFFFF
##B31E1A	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#504717

Deuteranopia (green-blind)

#746710

Tritanopia (blue-blind)

#C60020

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31e1a;
/* rgb */ color: rgb(179, 30, 26);
/* oklch */ color: oklch(49.5% 0.184 28.2);

Tailwind

colors: {
  custom: {
    50: '#d46b59',
    500: '#b31e1a',
    950: '#000000',
  },
}

SCSS

$custom: #b31e1a;
$custom-light: #d46b59;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e1a",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 26
  },
  "hsl": {
    "h": 1.569,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.49515,
    "c": 0.18408,
    "h": 28.2
  },
  "luminance": 0.10587
}

Semantic roles & 50–950 ramp

primary

#B31E1A

secondary

#5DC9CC

accent

#ECF137

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160703

muted

#847A78

Preview Lab

Preview with #B31E1A

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

Preview Lab → · Contrast checker → · Palette generator →