#B4231F#B4231F

#B4231F is a mid, vivid red. Relative luminance 0.110; OKLCH L 50.1% C 0.181 H 27.9°. Best body text is #FFFFFF at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#B4231F
RGB	rgb(180, 35, 31)
HSL	hsl(2, 71%, 41%)
HSV	hsv(2, 83%, 71%)
CMYK	cmyk(0%, 80.6%, 82.8%, 29.4%)
CIE-LAB	lab(39.59, 56.14, 39.89)
CIE-LCH	lch(39.59, 68.87, 35.40°)
OKLab	oklab(50.09% 0.1602 0.0847)
OKLCH	oklch(50.09% 0.181 27.9)
XYZ	xyz(19.6732, 11.0075, 2.3849)
Luminance	0.1100 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4231F #1FB0B4

analogous

#B41F66 #B4231F #B46E1F

triadic

#B4231F #1FB423 #231FB4

tetradic

#B4231F #66B41F #1FB0B4 #6E1FB4

square

#B4231F #66B41F #1FB0B4 #6E1FB4

split-complementary

#B4231F #1FB46E #1F66B4

monochromatic

#4C0F0D #801916 #B4231F #DC3934 #E56C68

Accessibility & contrast

On white

6.56

#B4231F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#B4231F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4231F

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4231F	#FFFFFF	#000000	##FFFFFF
##B4231F	1.00	6.56	3.20	6.56
#FFFFFF	6.56	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#52491C

Deuteranopia (green-blind)

#756817

Tritanopia (blue-blind)

#C70024

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #b4231f;
/* rgb */ color: rgb(180, 35, 31);
/* oklch */ color: oklch(50.1% 0.181 27.9);

Tailwind

colors: {
  custom: {
    50: '#d46d5c',
    500: '#b4231f',
    950: '#000000',
  },
}

SCSS

$custom: #b4231f;
$custom-light: #d46d5c;
$custom-dark: #000000;

JSON

{
  "hex": "#b4231f",
  "rgb": {
    "r": 180,
    "g": 35,
    "b": 31
  },
  "hsl": {
    "h": 1.611,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.50092,
    "c": 0.18124,
    "h": 27.9
  },
  "luminance": 0.11004
}

Semantic roles & 50–950 ramp

primary

#B4231F

secondary

#64C8CB

accent

#E9ED3A

background

#FEF6F5

surface

#FDECE9

border

#D5C7C5

text

#160804

muted

#847A79

Preview Lab

Preview with #B4231F

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

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