#B33D1C#B33D1C

#B33D1C is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.4% C 0.160 H 35.8°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#B33D1C
RGB	rgb(179, 61, 28)
HSL	hsl(13, 73%, 41%)
HSV	hsv(13, 84%, 70%)
CMYK	cmyk(0%, 65.9%, 84.4%, 29.8%)
CIE-LAB	lab(42.78, 46.37, 44.26)
CIE-LCH	lch(42.78, 64.10, 43.66°)
OKLab	oklab(52.43% 0.1294 0.0934)
OKLCH	oklch(52.43% 0.16 35.8)
XYZ	xyz(20.4711, 13.0081, 2.5313)
Luminance	0.1300 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33D1C #1C92B3

analogous

#B31C46 #B33D1C #B3891C

triadic

#B33D1C #1CB33D #3D1CB3

tetradic

#B33D1C #46B31C #1C92B3 #891CB3

square

#B33D1C #46B31C #1C92B3 #891CB3

split-complementary

#B33D1C #1CB389 #1C46B3

monochromatic

#49190B #7E2B14 #B33D1C #DE542E #E78063

Accessibility & contrast

On white

5.83

#B33D1C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#B33D1C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33D1C

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33D1C	#FFFFFF	#000000	##FFFFFF
##B33D1C	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)

#5F5416

Deuteranopia (green-blind)

#7C6F16

Tritanopia (blue-blind)

#C51937

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b33d1c;
/* rgb */ color: rgb(179, 61, 28);
/* oklch */ color: oklch(52.4% 0.160 35.8);

Tailwind

colors: {
  custom: {
    50: '#d3785c',
    500: '#b33d1c',
    950: '#000000',
  },
}

SCSS

$custom: #b33d1c;
$custom-light: #d3785c;
$custom-dark: #000000;

JSON

{
  "hex": "#b33d1c",
  "rgb": {
    "r": 179,
    "g": 61,
    "b": 28
  },
  "hsl": {
    "h": 13.113,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.5243,
    "c": 0.15962,
    "h": 35.8
  },
  "luminance": 0.13005
}

Semantic roles & 50–950 ramp

primary

#B33D1C

secondary

#5FB4CB

accent

#C8F038

background

#FEF7F5

surface

#FCEEE9

border

#D5C9C5

text

#160904

muted

#847B79

Preview Lab

Preview with #B33D1C

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

Preview Lab → · Contrast checker → · Palette generator →