#BB311F#BB311F

#BB311F is a mid, vivid red. Relative luminance 0.129; OKLCH L 52.5% C 0.178 H 30.9°. Best body text is #FFFFFF at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#BB311F
RGB	rgb(187, 49, 31)
HSL	hsl(7, 72%, 43%)
HSV	hsv(7, 83%, 73%)
CMYK	cmyk(0%, 73.8%, 83.4%, 26.7%)
CIE-LAB	lab(42.56, 53.86, 43.15)
CIE-LCH	lch(42.56, 69.01, 38.71°)
OKLab	oklab(52.55% 0.1524 0.0912)
OKLCH	oklch(52.55% 0.178 30.9)
XYZ	xyz(21.8418, 12.8638, 2.6290)
Luminance	0.1286 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#BB311F #1FA9BB

analogous

#BB1F5B #BB311F #BB7F1F

triadic

#BB311F #1FBB31 #311FBB

tetradic

#BB311F #5BBB1F #1FA9BB #7F1FBB

square

#BB311F #5BBB1F #1FA9BB #7F1FBB

split-complementary

#BB311F #1FBB7F #1F5BBB

monochromatic

#52150E #872316 #BB311F #DE4C39 #E77C6E

Accessibility & contrast

On white

5.88

#BB311F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#BB311F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #BB311F

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##BB311F	#FFFFFF	#000000	##FFFFFF
##BB311F	1.00	5.88	3.57	5.88
#FFFFFF	5.88	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B511B

Deuteranopia (green-blind)

#7D6F17

Tritanopia (blue-blind)

#CE002E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #bb311f;
/* rgb */ color: rgb(187, 49, 31);
/* oklch */ color: oklch(52.5% 0.178 30.9);

Tailwind

colors: {
  custom: {
    50: '#d9735d',
    500: '#bb311f',
    950: '#000000',
  },
}

SCSS

$custom: #bb311f;
$custom-light: #d9735d;
$custom-dark: #000000;

JSON

{
  "hex": "#bb311f",
  "rgb": {
    "r": 187,
    "g": 49,
    "b": 31
  },
  "hsl": {
    "h": 6.923,
    "s": 71.56,
    "l": 42.745
  },
  "oklch": {
    "l": 0.52546,
    "c": 0.17758,
    "h": 30.9
  },
  "luminance": 0.1286
}

Semantic roles & 50–950 ramp

primary

#BB311F

secondary

#69C1CD

accent

#D9EE3A

background

#FEF7F5

surface

#FDEDE9

border

#D5C8C5

text

#170904

muted

#857B79

Preview Lab

Preview with #BB311F

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

Preview Lab → · Contrast checker → · Palette generator →