#B33B1A#B33B1A

#B33B1A is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.2% C 0.162 H 35.6°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#B33B1A
RGB	rgb(179, 59, 26)
HSL	hsl(13, 75%, 40%)
HSV	hsv(13, 85%, 70%)
CMYK	cmyk(0%, 67%, 85.5%, 29.8%)
CIE-LAB	lab(42.44, 47.17, 44.89)
CIE-LCH	lch(42.44, 65.12, 43.58°)
OKLab	oklab(52.18% 0.1316 0.0941)
OKLCH	oklch(52.18% 0.162 35.6)
XYZ	xyz(20.3432, 12.7893, 2.3745)
Luminance	0.1279 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33B1A #1A92B3

analogous

#B31A46 #B33B1A #B3871A

triadic

#B33B1A #1AB33B #3B1AB3

tetradic

#B33B1A #46B31A #1A92B3 #871AB3

square

#B33B1A #46B31A #1A92B3 #871AB3

split-complementary

#B33B1A #1AB387 #1A46B3

monochromatic

#48180A #7E2912 #B33B1A #E0512A #E87D60

Accessibility & contrast

On white

5.90

#B33B1A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#B33B1A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33B1A

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33B1A	#FFFFFF	#000000	##FFFFFF
##B33B1A	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)

#5E5314

Deuteranopia (green-blind)

#7C6E13

Tritanopia (blue-blind)

#C51435

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33b1a;
/* rgb */ color: rgb(179, 59, 26);
/* oklch */ color: oklch(52.2% 0.162 35.6);

Tailwind

colors: {
  custom: {
    50: '#d3775a',
    500: '#b33b1a',
    950: '#000000',
  },
}

SCSS

$custom: #b33b1a;
$custom-light: #d3775a;
$custom-dark: #000000;

JSON

{
  "hex": "#b33b1a",
  "rgb": {
    "r": 179,
    "g": 59,
    "b": 26
  },
  "hsl": {
    "h": 12.941,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.52176,
    "c": 0.16176,
    "h": 35.6
  },
  "luminance": 0.12786
}

Semantic roles & 50–950 ramp

primary

#B33B1A

secondary

#5DB4CC

accent

#C9F137

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B33B1A

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

Preview Lab → · Contrast checker → · Palette generator →