#B33B1C#B33B1C

#B33B1C is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.2% C 0.161 H 35.1°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#B33B1C
RGB	rgb(179, 59, 28)
HSL	hsl(12, 73%, 41%)
HSV	hsv(12, 84%, 70%)
CMYK	cmyk(0%, 67%, 84.4%, 29.8%)
CIE-LAB	lab(42.46, 47.23, 43.97)
CIE-LCH	lch(42.46, 64.53, 42.96°)
OKLab	oklab(52.19% 0.1321 0.0928)
OKLCH	oklch(52.19% 0.161 35.1)
XYZ	xyz(20.3663, 12.7985, 2.4963)
Luminance	0.1280 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33B1C #1C94B3

analogous

#B31C48 #B33B1C #B3861C

triadic

#B33B1C #1CB33B #3B1CB3

tetradic

#B33B1C #48B31C #1C94B3 #861CB3

square

#B33B1C #48B31C #1C94B3 #861CB3

split-complementary

#B33B1C #1CB386 #1C48B3

monochromatic

#49180B #7E2A14 #B33B1C #DE522E #E77E63

Accessibility & contrast

On white

5.90

#B33B1C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#B33B1C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33B1C

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33B1C	#FFFFFF	#000000	##FFFFFF
##B33B1C	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E5317

Deuteranopia (green-blind)

#7C6E16

Tritanopia (blue-blind)

#C51435

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33b1c;
/* rgb */ color: rgb(179, 59, 28);
/* oklch */ color: oklch(52.2% 0.161 35.1);

Tailwind

colors: {
  custom: {
    50: '#d3775b',
    500: '#b33b1c',
    950: '#000000',
  },
}

SCSS

$custom: #b33b1c;
$custom-light: #d3775b;
$custom-dark: #000000;

JSON

{
  "hex": "#b33b1c",
  "rgb": {
    "r": 179,
    "g": 59,
    "b": 28
  },
  "hsl": {
    "h": 12.318,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.52191,
    "c": 0.1614,
    "h": 35.1
  },
  "luminance": 0.12795
}

Semantic roles & 50–950 ramp

primary

#B33B1C

secondary

#5FB5CB

accent

#CAF038

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B33B1C

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

Preview Lab → · Contrast checker → · Palette generator →