#B3231F#B3231F

#B3231F is a mid, vivid red. Relative luminance 0.109; OKLCH L 49.9% C 0.180 H 27.8°. Best body text is #FFFFFF at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#B3231F
RGB	rgb(179, 35, 31)
HSL	hsl(2, 70%, 41%)
HSV	hsv(2, 83%, 70%)
CMYK	cmyk(0%, 80.4%, 82.7%, 29.8%)
CIE-LAB	lab(39.39, 55.84, 39.63)
CIE-LCH	lch(39.39, 68.48, 35.36°)
OKLab	oklab(49.91% 0.1594 0.0842)
OKLCH	oklch(49.91% 0.18 27.8)
XYZ	xyz(19.4412, 10.8879, 2.3740)
Luminance	0.1089 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3231F #1FAFB3

analogous

#B31F65 #B3231F #B36D1F

triadic

#B3231F #1FB323 #231FB3

tetradic

#B3231F #65B31F #1FAFB3 #6D1FB3

square

#B3231F #65B31F #1FAFB3 #6D1FB3

split-complementary

#B3231F #1FB36D #1F65B3

monochromatic

#4B0F0D #7F1916 #B3231F #DC3833 #E56B68

Accessibility & contrast

On white

6.61

#B3231F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#B3231F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B3231F

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3231F	#FFFFFF	#000000	##FFFFFF
##B3231F	1.00	6.61	3.18	6.61
#FFFFFF	6.61	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#52491C

Deuteranopia (green-blind)

#756817

Tritanopia (blue-blind)

#C60024

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #b3231f;
/* rgb */ color: rgb(179, 35, 31);
/* oklch */ color: oklch(49.9% 0.180 27.8);

Tailwind

colors: {
  custom: {
    50: '#d46c5c',
    500: '#b3231f',
    950: '#000000',
  },
}

SCSS

$custom: #b3231f;
$custom-light: #d46c5c;
$custom-dark: #000000;

JSON

{
  "hex": "#b3231f",
  "rgb": {
    "r": 179,
    "g": 35,
    "b": 31
  },
  "hsl": {
    "h": 1.622,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.49907,
    "c": 0.18031,
    "h": 27.8
  },
  "luminance": 0.10885
}

Semantic roles & 50–950 ramp

primary

#B3231F

secondary

#64C7CA

accent

#E8ED3B

background

#FEF6F5

surface

#FCECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #B3231F

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

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