#B3731B#B3731B

#B3731B is a mid, vivid orange. Relative luminance 0.219; OKLCH L 61.0% C 0.124 H 68.4°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#B3731B
RGB	rgb(179, 115, 27)
HSL	hsl(35, 74%, 40%)
HSV	hsv(35, 85%, 70%)
CMYK	cmyk(0%, 35.8%, 84.9%, 29.8%)
CIE-LAB	lab(53.95, 18.52, 54.36)
CIE-LCH	lch(53.95, 57.43, 71.19°)
OKLab	oklab(60.98% 0.0458 0.1157)
OKLCH	oklch(60.98% 0.124 68.4)
XYZ	xyz(24.9210, 21.9267, 3.9565)
Luminance	0.2192 (WCAG relative)
Temperature	warm
Family	orange

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3731B #1B5BB3

analogous

#B3271B #B3731B #A7B31B

triadic

#B3731B #1BB373 #731BB3

tetradic

#B3731B #1BB327 #1B5BB3 #B31BA7

square

#B3731B #1BB327 #1B5BB3 #B31BA7

split-complementary

#B3731B #1BA7B3 #271BB3

monochromatic

#492F0B #7E5113 #B3731B #DF942C #E7AF61

Accessibility & contrast

On white

3.90

#B3731B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#B3731B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #B3731B

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3731B	#FFFFFF	#000000	##000000
##B3731B	1.00	3.90	5.38	5.38
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#887805

Deuteranopia (green-blind)

#97871E

Tritanopia (blue-blind)

#C46363

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #b3731b;
/* rgb */ color: rgb(179, 115, 27);
/* oklch */ color: oklch(61.0% 0.124 68.4);

Tailwind

colors: {
  custom: {
    50: '#d09b61',
    500: '#b3731b',
    950: '#000000',
  },
}

SCSS

$custom: #b3731b;
$custom-light: #d09b61;
$custom-dark: #000000;

JSON

{
  "hex": "#b3731b",
  "rgb": {
    "r": 179,
    "g": 115,
    "b": 27
  },
  "hsl": {
    "h": 34.737,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.6098,
    "c": 0.12441,
    "h": 68.4
  },
  "luminance": 0.21924
}

Semantic roles & 50–950 ramp

primary

#B3731B

secondary

#5E8CCC

accent

#85F037

background

#FDF9F6

surface

#FBF2EB

border

#D4CCC6

text

#150E05

muted

#837E7A

Preview Lab

Preview with #B3731B

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

Preview Lab → · Contrast checker → · Palette generator →