#B31E17#B31E17

#B31E17 is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.5% C 0.184 H 28.8°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#B31E17
RGB	rgb(179, 30, 23)
HSL	hsl(3, 77%, 40%)
HSV	hsv(3, 87%, 70%)
CMYK	cmyk(0%, 83.2%, 87.2%, 29.8%)
CIE-LAB	lab(38.86, 56.97, 43.26)
CIE-LCH	lch(38.86, 71.53, 37.21°)
OKLab	oklab(49.49% 0.1615 0.089)
OKLCH	oklch(49.49% 0.184 28.8)
XYZ	xyz(19.2118, 10.5773, 1.8405)
Luminance	0.1057 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E17 #17ACB3

analogous

#B3175E #B31E17 #B36C17

triadic

#B31E17 #17B31E #1E17B3

tetradic

#B31E17 #5EB317 #17ACB3 #6C17B3

square

#B31E17 #5EB317 #17ACB3 #6C17B3

split-complementary

#B31E17 #17B36C #175EB3

monochromatic

#470C09 #7D1510 #B31E17 #E32D24 #EA615B

Accessibility & contrast

On white

6.74

#B31E17 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#B31E17 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E17

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E17	#FFFFFF	#000000	##FFFFFF
##B31E17	1.00	6.74	3.11	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#504713

Deuteranopia (green-blind)

#74670C

Tritanopia (blue-blind)

#C6001F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #b31e17;
/* rgb */ color: rgb(179, 30, 23);
/* oklch */ color: oklch(49.5% 0.184 28.8);

Tailwind

colors: {
  custom: {
    50: '#d46a57',
    500: '#b31e17',
    950: '#000000',
  },
}

SCSS

$custom: #b31e17;
$custom-light: #d46a57;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e17",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 23
  },
  "hsl": {
    "h": 2.692,
    "s": 77.228,
    "l": 39.608
  },
  "oklch": {
    "l": 0.49492,
    "c": 0.18438,
    "h": 28.8
  },
  "luminance": 0.10574
}

Semantic roles & 50–950 ramp

primary

#B31E17

secondary

#58C8CD

accent

#EBF434

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160703

muted

#847A78

Preview Lab

Preview with #B31E17

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

Preview Lab → · Contrast checker → · Palette generator →