#B4381F#B4381F

#B4381F is a mid, vivid red. Relative luminance 0.126; OKLCH L 52.0% C 0.165 H 33.2°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#B4381F
RGB	rgb(180, 56, 31)
HSL	hsl(10, 71%, 41%)
HSV	hsv(10, 83%, 71%)
CMYK	cmyk(0%, 68.9%, 82.8%, 29.4%)
CIE-LAB	lab(42.21, 48.90, 42.35)
CIE-LCH	lch(42.21, 64.69, 40.90°)
OKLab	oklab(52.04% 0.1377 0.0902)
OKLCH	oklch(52.04% 0.165 33.2)
XYZ	xyz(20.4863, 12.6337, 2.6559)
Luminance	0.1263 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B4381F #1F9BB4

analogous

#B41F51 #B4381F #B4831F

triadic

#B4381F #1FB438 #381FB4

tetradic

#B4381F #51B41F #1F9BB4 #831FB4

square

#B4381F #51B41F #1F9BB4 #831FB4

split-complementary

#B4381F #1FB483 #1F51B4

monochromatic

#4C180D #802816 #B4381F #DC5034 #E57D68

Accessibility & contrast

On white

5.96

#B4381F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#B4381F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B4381F

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B4381F	#FFFFFF	#000000	##FFFFFF
##B4381F	1.00	5.96	3.53	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D521B

Deuteranopia (green-blind)

#7B6E19

Tritanopia (blue-blind)

#C60A33

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b4381f;
/* rgb */ color: rgb(180, 56, 31);
/* oklch */ color: oklch(52.0% 0.165 33.2);

Tailwind

colors: {
  custom: {
    50: '#d3765d',
    500: '#b4381f',
    950: '#000000',
  },
}

SCSS

$custom: #b4381f;
$custom-light: #d3765d;
$custom-dark: #000000;

JSON

{
  "hex": "#b4381f",
  "rgb": {
    "r": 180,
    "g": 56,
    "b": 31
  },
  "hsl": {
    "h": 10.067,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.52043,
    "c": 0.16456,
    "h": 33.2
  },
  "luminance": 0.12631
}

Semantic roles & 50–950 ramp

primary

#B4381F

secondary

#64B9CB

accent

#CFED3A

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B4381F

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

Preview Lab → · Contrast checker → · Palette generator →