#B31929#B31929

#B31929 is a mid, vivid red. Relative luminance 0.104; OKLCH L 49.4% C 0.185 H 23.3°. Best body text is #FFFFFF at 6.80:1 contrast (WCAG AA passes).

Color values

HEX	#B31929
RGB	rgb(179, 25, 41)
HSL	hsl(354, 75%, 40%)
HSV	hsv(354, 86%, 70%)
CMYK	cmyk(0%, 86%, 77.1%, 29.8%)
CIE-LAB	lab(38.62, 58.64, 33.15)
CIE-LCH	lch(38.62, 67.36, 29.48°)
OKLab	oklab(49.37% 0.1704 0.0733)
OKLCH	oklch(49.37% 0.185 23.3)
XYZ	xyz(19.3407, 10.4422, 3.0946)
Luminance	0.1044 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31929 #19B3A3

analogous

#B31976 #B31929 #B35619

triadic

#B31929 #29B319 #1929B3

tetradic

#B31929 #76B319 #19B3A3 #5619B3

square

#B31929 #76B319 #19B3A3 #5619B3

split-complementary

#B31929 #19B356 #1976B3

monochromatic

#480A10 #7D121D #B31929 #E1283B #E85E6C

Accessibility & contrast

On white

6.80

#B31929 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#B31929 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31929

6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31929	#FFFFFF	#000000	##FFFFFF
##B31929	1.00	6.80	3.09	6.80
#FFFFFF	6.80	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D4628

Deuteranopia (green-blind)

#726623

Tritanopia (blue-blind)

#C50021

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #b31929;
/* rgb */ color: rgb(179, 25, 41);
/* oklch */ color: oklch(49.4% 0.185 23.3);

Tailwind

colors: {
  custom: {
    50: '#d36963',
    500: '#b31929',
    950: '#000000',
  },
}

SCSS

$custom: #b31929;
$custom-light: #d36963;
$custom-dark: #000000;

JSON

{
  "hex": "#b31929",
  "rgb": {
    "r": 179,
    "g": 25,
    "b": 41
  },
  "hsl": {
    "h": 353.766,
    "s": 75.49,
    "l": 40
  },
  "oklch": {
    "l": 0.49372,
    "c": 0.18549,
    "h": 23.3
  },
  "luminance": 0.10439
}

Semantic roles & 50–950 ramp

primary

#B31929

secondary

#5BCCC1

accent

#F2DF36

background

#FEF6F5

surface

#FCECEA

border

#D5C7C6

text

#160705

muted

#847A79

Preview Lab

Preview with #B31929

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

Preview Lab → · Contrast checker → · Palette generator →