#B31E1D#B31E1D

#B31E1D is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.5% C 0.184 H 27.5°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#B31E1D
RGB	rgb(179, 30, 29)
HSL	hsl(0, 72%, 41%)
HSV	hsv(0, 84%, 70%)
CMYK	cmyk(0%, 83.2%, 83.8%, 29.8%)
CIE-LAB	lab(38.91, 57.11, 40.24)
CIE-LCH	lch(38.91, 69.87, 35.17°)
OKLab	oklab(49.54% 0.163 0.0848)
OKLCH	oklch(49.54% 0.184 27.5)
XYZ	xyz(19.2789, 10.6042, 2.1939)
Luminance	0.1060 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E1D #1DB2B3

analogous

#B31D67 #B31E1D #B3691D

triadic

#B31E1D #1DB31E #1E1DB3

tetradic

#B31E1D #67B31D #1DB2B3 #691DB3

square

#B31E1D #67B31D #1DB2B3 #691DB3

split-complementary

#B31E1D #1DB369 #1D67B3

monochromatic

#4A0C0C #7E1514 #B31E1D #DD3130 #E66564

Accessibility & contrast

On white

6.73

#B31E1D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B31E1D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E1D

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E1D	#FFFFFF	#000000	##FFFFFF
##B31E1D	1.00	6.73	3.12	6.73
#FFFFFF	6.73	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#50471A

Deuteranopia (green-blind)

#746714

Tritanopia (blue-blind)

#C60021

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31e1d;
/* rgb */ color: rgb(179, 30, 29);
/* oklch */ color: oklch(49.5% 0.184 27.5);

Tailwind

colors: {
  custom: {
    50: '#d46b5b',
    500: '#b31e1d',
    950: '#000000',
  },
}

SCSS

$custom: #b31e1d;
$custom-light: #d46b5b;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e1d",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 29
  },
  "hsl": {
    "h": 0.4,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.49541,
    "c": 0.18375,
    "h": 27.5
  },
  "luminance": 0.10601
}

Semantic roles & 50–950 ramp

primary

#B31E1D

secondary

#61CACB

accent

#EEEF39

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160704

muted

#847A79

Preview Lab

Preview with #B31E1D

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

Preview Lab → · Contrast checker → · Palette generator →