#B3631C#B3631C

#B3631C is a mid, vivid orange. Relative luminance 0.186; OKLCH L 58.1% C 0.130 H 56.3°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#B3631C
RGB	rgb(179, 99, 28)
HSL	hsl(28, 73%, 41%)
HSV	hsv(28, 84%, 70%)
CMYK	cmyk(0%, 44.7%, 84.4%, 29.8%)
CIE-LAB	lab(50.21, 27.38, 50.79)
CIE-LCH	lch(50.21, 57.70, 61.67°)
OKLab	oklab(58.09% 0.072 0.108)
OKLCH	oklch(58.09% 0.13 56.3)
XYZ	xyz(23.2640, 18.5939, 3.4622)
Luminance	0.1859 (WCAG relative)
Temperature	warm
Family	orange

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3631C #1C6CB3

analogous

#B31C20 #B3631C #B3AE1C

triadic

#B3631C #1CB363 #631CB3

tetradic

#B3631C #20B31C #1C6CB3 #AE1CB3

square

#B3631C #20B31C #1C6CB3 #AE1CB3

split-complementary

#B3631C #1CB3AE #1C20B3

monochromatic

#49280B #7E4614 #B3631C #DE812E #E7A163

Accessibility & contrast

On white

4.45

#B3631C on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#B3631C on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #B3631C

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3631C	#FFFFFF	#000000	##000000
##B3631C	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B6C0E

Deuteranopia (green-blind)

#8E7F1B

Tritanopia (blue-blind)

#C45155

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #b3631c;
/* rgb */ color: rgb(179, 99, 28);
/* oklch */ color: oklch(58.1% 0.130 56.3);

Tailwind

colors: {
  custom: {
    50: '#d0905f',
    500: '#b3631c',
    950: '#000000',
  },
}

SCSS

$custom: #b3631c;
$custom-light: #d0905f;
$custom-dark: #000000;

JSON

{
  "hex": "#b3631c",
  "rgb": {
    "r": 179,
    "g": 99,
    "b": 28
  },
  "hsl": {
    "h": 28.212,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.5809,
    "c": 0.12984,
    "h": 56.3
  },
  "luminance": 0.18591
}

Semantic roles & 50–950 ramp

primary

#B3631C

secondary

#5F99CB

accent

#99F038

background

#FDF8F5

surface

#FBF0EA

border

#D4CBC6

text

#150C05

muted

#837D79

Preview Lab

Preview with #B3631C

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

Preview Lab → · Contrast checker → · Palette generator →