#B31F1E#B31F1E

#B31F1E is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.6% C 0.183 H 27.4°. Best body text is #FFFFFF at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#B31F1E
RGB	rgb(179, 31, 30)
HSL	hsl(0, 71%, 41%)
HSV	hsv(0, 83%, 70%)
CMYK	cmyk(0%, 82.7%, 83.2%, 29.8%)
CIE-LAB	lab(39.00, 56.89, 39.80)
CIE-LCH	lch(39.00, 69.43, 34.98°)
OKLab	oklab(49.62% 0.1625 0.0842)
OKLCH	oklch(49.62% 0.183 27.4)
XYZ	xyz(19.3172, 10.6606, 2.2686)
Luminance	0.1066 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31F1E #1EB2B3

analogous

#B31E67 #B31F1E #B3691E

triadic

#B31F1E #1EB31F #1F1EB3

tetradic

#B31F1E #67B31E #1EB2B3 #691EB3

square

#B31F1E #67B31E #1EB2B3 #691EB3

split-complementary

#B31F1E #1EB369 #1E67B3

monochromatic

#4A0D0C #7F1615 #B31F1E #DD3332 #E56766

Accessibility & contrast

On white

6.71

#B31F1E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#B31F1E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31F1E

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31F1E	#FFFFFF	#000000	##FFFFFF
##B31F1E	1.00	6.71	3.13	6.71
#FFFFFF	6.71	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#50471B

Deuteranopia (green-blind)

#746716

Tritanopia (blue-blind)

#C60021

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31f1e;
/* rgb */ color: rgb(179, 31, 30);
/* oklch */ color: oklch(49.6% 0.183 27.4);

Tailwind

colors: {
  custom: {
    50: '#d46b5b',
    500: '#b31f1e',
    950: '#000000',
  },
}

SCSS

$custom: #b31f1e;
$custom-light: #d46b5b;
$custom-dark: #000000;

JSON

{
  "hex": "#b31f1e",
  "rgb": {
    "r": 179,
    "g": 31,
    "b": 30
  },
  "hsl": {
    "h": 0.403,
    "s": 71.292,
    "l": 40.98
  },
  "oklch": {
    "l": 0.49616,
    "c": 0.18302,
    "h": 27.4
  },
  "luminance": 0.10657
}

Semantic roles & 50–950 ramp

primary

#B31F1E

secondary

#62CACB

accent

#EDEE3A

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #B31F1E

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

Preview Lab → · Contrast checker → · Palette generator →