#B33A1C#B33A1C

#B33A1C is a mid, vivid red. Relative luminance 0.127; OKLCH L 52.1% C 0.162 H 34.7°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#B33A1C
RGB	rgb(179, 58, 28)
HSL	hsl(12, 73%, 41%)
HSV	hsv(12, 84%, 70%)
CMYK	cmyk(0%, 67.6%, 84.4%, 29.8%)
CIE-LAB	lab(42.30, 47.65, 43.83)
CIE-LCH	lch(42.30, 64.74, 42.61°)
OKLab	oklab(52.07% 0.1334 0.0925)
OKLCH	oklch(52.07% 0.162 34.7)
XYZ	xyz(20.3154, 12.6967, 2.4794)
Luminance	0.1269 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33A1C #1C95B3

analogous

#B31C49 #B33A1C #B3861C

triadic

#B33A1C #1CB33A #3A1CB3

tetradic

#B33A1C #49B31C #1C95B3 #861CB3

square

#B33A1C #49B31C #1C95B3 #861CB3

split-complementary

#B33A1C #1CB386 #1C49B3

monochromatic

#49180B #7E2914 #B33A1C #DE512E #E77D63

Accessibility & contrast

On white

5.93

#B33A1C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#B33A1C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33A1C

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33A1C	#FFFFFF	#000000	##FFFFFF
##B33A1C	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E5317

Deuteranopia (green-blind)

#7B6E15

Tritanopia (blue-blind)

#C51134

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33a1c;
/* rgb */ color: rgb(179, 58, 28);
/* oklch */ color: oklch(52.1% 0.162 34.7);

Tailwind

colors: {
  custom: {
    50: '#d3775b',
    500: '#b33a1c',
    950: '#000000',
  },
}

SCSS

$custom: #b33a1c;
$custom-light: #d3775b;
$custom-dark: #000000;

JSON

{
  "hex": "#b33a1c",
  "rgb": {
    "r": 179,
    "g": 58,
    "b": 28
  },
  "hsl": {
    "h": 11.921,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.52074,
    "c": 0.16228,
    "h": 34.7
  },
  "luminance": 0.12694
}

Semantic roles & 50–950 ramp

primary

#B33A1C

secondary

#5FB6CB

accent

#CBF038

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B33A1C

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

Preview Lab → · Contrast checker → · Palette generator →