#B31E1F#B31E1F

#B31E1F is a mid, vivid red. Relative luminance 0.106; OKLCH L 49.6% C 0.184 H 27.0°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#B31E1F
RGB	rgb(179, 30, 31)
HSL	hsl(360, 71%, 41%)
HSV	hsv(360, 83%, 70%)
CMYK	cmyk(0%, 83.2%, 82.7%, 29.8%)
CIE-LAB	lab(38.92, 57.17, 39.18)
CIE-LCH	lch(38.92, 69.31, 34.43°)
OKLab	oklab(49.56% 0.1636 0.0832)
OKLCH	oklch(49.56% 0.184 27)
XYZ	xyz(19.3044, 10.6144, 2.3284)
Luminance	0.1061 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31E1F #1EB3B2

analogous

#B31E69 #B31E1F #B3671E

triadic

#B31E1F #1FB31E #1E1FB3

tetradic

#B31E1F #69B31E #1EB3B2 #671EB3

square

#B31E1F #69B31E #1EB3B2 #671EB3

split-complementary

#B31E1F #1EB367 #1E69B3

monochromatic

#4A0C0D #7F1516 #B31E1F #DD3233 #E56667

Accessibility & contrast

On white

6.73

#B31E1F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#B31E1F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31E1F

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31E1F	#FFFFFF	#000000	##FFFFFF
##B31E1F	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)

#50471D

Deuteranopia (green-blind)

#746717

Tritanopia (blue-blind)

#C60021

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b31e1f;
/* rgb */ color: rgb(179, 30, 31);
/* oklch */ color: oklch(49.6% 0.184 27.0);

Tailwind

colors: {
  custom: {
    50: '#d46b5c',
    500: '#b31e1f',
    950: '#000000',
  },
}

SCSS

$custom: #b31e1f;
$custom-light: #d46b5c;
$custom-dark: #000000;

JSON

{
  "hex": "#b31e1f",
  "rgb": {
    "r": 179,
    "g": 30,
    "b": 31
  },
  "hsl": {
    "h": 359.597,
    "s": 71.292,
    "l": 40.98
  },
  "oklch": {
    "l": 0.49559,
    "c": 0.18354,
    "h": 27
  },
  "luminance": 0.10611
}

Semantic roles & 50–950 ramp

primary

#B31E1F

secondary

#62CBCA

accent

#EEED3A

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160704

muted

#847A79

Preview Lab

Preview with #B31E1F

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

Preview Lab → · Contrast checker → · Palette generator →