#B3311E#B3311E

#B3311E is a mid, vivid red. Relative luminance 0.119; OKLCH L 51.1% C 0.170 H 31.4°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#B3311E
RGB	rgb(179, 49, 30)
HSL	hsl(8, 71%, 41%)
HSV	hsv(8, 83%, 70%)
CMYK	cmyk(0%, 72.6%, 83.2%, 29.8%)
CIE-LAB	lab(41.02, 51.25, 41.68)
CIE-LCH	lch(41.02, 66.06, 39.12°)
OKLab	oklab(51.12% 0.1449 0.0884)
OKLCH	oklch(51.12% 0.17 31.4)
XYZ	xyz(19.9255, 11.8772, 2.4714)
Luminance	0.1187 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B3311E #1EA0B3

analogous

#B31E55 #B3311E #B37B1E

triadic

#B3311E #1EB331 #311EB3

tetradic

#B3311E #55B31E #1EA0B3 #7B1EB3

square

#B3311E #55B31E #1EA0B3 #7B1EB3

split-complementary

#B3311E #1EB37B #1E55B3

monochromatic

#4A140C #7F2315 #B3311E #DD4732 #E57666

Accessibility & contrast

On white

6.22

#B3311E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#B3311E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B3311E

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B3311E	#FFFFFF	#000000	##FFFFFF
##B3311E	1.00	6.22	3.37	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#584E1A

Deuteranopia (green-blind)

#786B17

Tritanopia (blue-blind)

#C5002E

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #b3311e;
/* rgb */ color: rgb(179, 49, 30);
/* oklch */ color: oklch(51.1% 0.170 31.4);

Tailwind

colors: {
  custom: {
    50: '#d3725c',
    500: '#b3311e',
    950: '#000000',
  },
}

SCSS

$custom: #b3311e;
$custom-light: #d3725c;
$custom-dark: #000000;

JSON

{
  "hex": "#b3311e",
  "rgb": {
    "r": 179,
    "g": 49,
    "b": 30
  },
  "hsl": {
    "h": 7.651,
    "s": 71.292,
    "l": 40.98
  },
  "oklch": {
    "l": 0.51118,
    "c": 0.16972,
    "h": 31.4
  },
  "luminance": 0.11874
}

Semantic roles & 50–950 ramp

primary

#B3311E

secondary

#62BDCB

accent

#D7EE3A

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160804

muted

#847B79

Preview Lab

Preview with #B3311E

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

Preview Lab → · Contrast checker → · Palette generator →