#B33D1B#B33D1B

#B33D1B is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.4% C 0.160 H 36.1°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#B33D1B
RGB	rgb(179, 61, 27)
HSL	hsl(13, 74%, 40%)
HSV	hsv(13, 85%, 70%)
CMYK	cmyk(0%, 65.9%, 84.9%, 29.8%)
CIE-LAB	lab(42.77, 46.34, 44.71)
CIE-LCH	lch(42.77, 64.40, 43.98°)
OKLab	oklab(52.42% 0.1292 0.0941)
OKLCH	oklch(52.42% 0.16 36.1)
XYZ	xyz(20.4593, 13.0034, 2.4693)
Luminance	0.1300 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33D1B #1B91B3

analogous

#B31B45 #B33D1B #B3891B

triadic

#B33D1B #1BB33D #3D1BB3

tetradic

#B33D1B #45B31B #1B91B3 #891BB3

square

#B33D1B #45B31B #1B91B3 #891BB3

split-complementary

#B33D1B #1BB389 #1B45B3

monochromatic

#49190B #7E2B13 #B33D1B #DF542C #E77F61

Accessibility & contrast

On white

5.83

#B33D1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#B33D1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33D1B

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33D1B	#FFFFFF	#000000	##FFFFFF
##B33D1B	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F5415

Deuteranopia (green-blind)

#7C6F15

Tritanopia (blue-blind)

#C51937

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b33d1b;
/* rgb */ color: rgb(179, 61, 27);
/* oklch */ color: oklch(52.4% 0.160 36.1);

Tailwind

colors: {
  custom: {
    50: '#d3785b',
    500: '#b33d1b',
    950: '#000000',
  },
}

SCSS

$custom: #b33d1b;
$custom-light: #d3785b;
$custom-dark: #000000;

JSON

{
  "hex": "#b33d1b",
  "rgb": {
    "r": 179,
    "g": 61,
    "b": 27
  },
  "hsl": {
    "h": 13.421,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.52422,
    "c": 0.15981,
    "h": 36.1
  },
  "luminance": 0.13
}

Semantic roles & 50–950 ramp

primary

#B33D1B

secondary

#5EB3CC

accent

#C7F037

background

#FEF7F5

surface

#FCEEE9

border

#D5C9C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B33D1B

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

Preview Lab → · Contrast checker → · Palette generator →