#B3731F#B3731F

#B3731F is a mid, vivid orange. Relative luminance 0.219; OKLCH L 61.0% C 0.123 H 67.7°. Best body text is #000000 at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#B3731F
RGB	rgb(179, 115, 31)
HSL	hsl(34, 70%, 41%)
HSV	hsv(34, 83%, 70%)
CMYK	cmyk(0%, 35.8%, 82.7%, 29.8%)
CIE-LAB	lab(53.97, 18.64, 52.97)
CIE-LCH	lch(53.97, 56.15, 70.62°)
OKLab	oklab(61% 0.0466 0.1137)
OKLCH	oklch(61% 0.123 67.7)
XYZ	xyz(24.9705, 21.9465, 4.2171)
Luminance	0.2194 (WCAG relative)
Temperature	warm
Family	orange

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3731F #1F5FB3

analogous

#B3291F #B3731F #A9B31F

triadic

#B3731F #1FB373 #731FB3

tetradic

#B3731F #1FB329 #1F5FB3 #B31FA9

square

#B3731F #1FB329 #1F5FB3 #B31FA9

split-complementary

#B3731F #1FA9B3 #291FB3

monochromatic

#4B300D #7F5116 #B3731F #DC9333 #E5AF68

Accessibility & contrast

On white

3.90

#B3731F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.39

#B3731F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #B3731F

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3731F	#FFFFFF	#000000	##000000
##B3731F	1.00	3.90	5.39	5.39
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.39	21.00	1.00	1.00
##000000	5.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#88780E

Deuteranopia (green-blind)

#978721

Tritanopia (blue-blind)

#C46463

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #b3731f;
/* rgb */ color: rgb(179, 115, 31);
/* oklch */ color: oklch(61.0% 0.123 67.7);

Tailwind

colors: {
  custom: {
    50: '#d09b62',
    500: '#b3731f',
    950: '#000000',
  },
}

SCSS

$custom: #b3731f;
$custom-light: #d09b62;
$custom-dark: #000000;

JSON

{
  "hex": "#b3731f",
  "rgb": {
    "r": 179,
    "g": 115,
    "b": 31
  },
  "hsl": {
    "h": 34.054,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.61003,
    "c": 0.12285,
    "h": 67.7
  },
  "luminance": 0.21944
}

Semantic roles & 50–950 ramp

primary

#B3731F

secondary

#6490CA

accent

#88ED3B

background

#FDF9F6

surface

#FBF2EB

border

#D4CCC6

text

#150E05

muted

#837E7A

Preview Lab

Preview with #B3731F

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

Preview Lab → · Contrast checker → · Palette generator →