#B31C19#B31C19

#B31C19 is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.4% C 0.185 H 28.1°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#B31C19
RGB	rgb(179, 28, 25)
HSL	hsl(1, 75%, 40%)
HSV	hsv(1, 86%, 70%)
CMYK	cmyk(0%, 84.4%, 86%, 29.8%)
CIE-LAB	lab(38.70, 57.50, 42.14)
CIE-LCH	lch(38.70, 71.29, 36.23°)
OKLab	oklab(49.38% 0.1635 0.0873)
OKLCH	oklch(49.38% 0.185 28.1)
XYZ	xyz(19.1836, 10.4876, 1.9338)
Luminance	0.1048 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B31C19 #19B0B3

analogous

#B31963 #B31C19 #B36919

triadic

#B31C19 #19B31C #1C19B3

tetradic

#B31C19 #63B319 #19B0B3 #6919B3

square

#B31C19 #63B319 #19B0B3 #6919B3

split-complementary

#B31C19 #19B369 #1963B3

monochromatic

#480B0A #7D1412 #B31C19 #E12C28 #E8615E

Accessibility & contrast

On white

6.78

#B31C19 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#B31C19 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B31C19

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B31C19	#FFFFFF	#000000	##FFFFFF
##B31C19	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F4616

Deuteranopia (green-blind)

#74670F

Tritanopia (blue-blind)

#C6001E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #b31c19;
/* rgb */ color: rgb(179, 28, 25);
/* oklch */ color: oklch(49.4% 0.185 28.1);

Tailwind

colors: {
  custom: {
    50: '#d46a58',
    500: '#b31c19',
    950: '#000000',
  },
}

SCSS

$custom: #b31c19;
$custom-light: #d46a58;
$custom-dark: #000000;

JSON

{
  "hex": "#b31c19",
  "rgb": {
    "r": 179,
    "g": 28,
    "b": 25
  },
  "hsl": {
    "h": 1.169,
    "s": 75.49,
    "l": 40
  },
  "oklch": {
    "l": 0.49381,
    "c": 0.18535,
    "h": 28.1
  },
  "luminance": 0.10484
}

Semantic roles & 50–950 ramp

primary

#B31C19

secondary

#5BCACC

accent

#EEF236

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160703

muted

#847A78

Preview Lab

Preview with #B31C19

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

Preview Lab → · Contrast checker → · Palette generator →