#B31E18#B31E18

#B31E18 is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.5% C 0.184 H 28.6°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#B31E18
RGB	rgb(179, 30, 24)
HSL	hsl(2, 76%, 40%)
HSV	hsv(2, 87%, 70%)
CMYK	cmyk(0%, 83.2%, 86.6%, 29.8%)
CIE-LAB	lab(38.87, 57.00, 42.77)
CIE-LCH	lch(38.87, 71.26, 36.89°)
OKLab	oklab(49.5% 0.1617 0.0883)
OKLCH	oklch(49.5% 0.184 28.6)
XYZ	xyz(19.2220, 10.5814, 1.8943)
Luminance	0.1058 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E18 #18ADB3

analogous

#B3185F #B31E18 #B36C18

triadic

#B31E18 #18B31E #1E18B3

tetradic

#B31E18 #5FB318 #18ADB3 #6C18B3

square

#B31E18 #5FB318 #18ADB3 #6C18B3

split-complementary

#B31E18 #18B36C #185FB3

monochromatic

#470C0A #7D1511 #B31E18 #E22E26 #E9625C

Accessibility & contrast

On white

6.74

#B31E18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B31E18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E18

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E18	#FFFFFF	#000000	##FFFFFF
##B31E18	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)

#504714

Deuteranopia (green-blind)

#74670D

Tritanopia (blue-blind)

#C6001F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #b31e18;
/* rgb */ color: rgb(179, 30, 24);
/* oklch */ color: oklch(49.5% 0.184 28.6);

Tailwind

colors: {
  custom: {
    50: '#d46b57',
    500: '#b31e18',
    950: '#000000',
  },
}

SCSS

$custom: #b31e18;
$custom-light: #d46b57;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e18",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 24
  },
  "hsl": {
    "h": 2.323,
    "s": 76.355,
    "l": 39.804
  },
  "oklch": {
    "l": 0.49499,
    "c": 0.18428,
    "h": 28.6
  },
  "luminance": 0.10578
}

Semantic roles & 50–950 ramp

primary

#B31E18

secondary

#5AC8CD

accent

#ECF335

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160703

muted

#847A78

Preview Lab

Preview with #B31E18

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

Preview Lab → · Contrast checker → · Palette generator →