#B33A2B#B33A2B

#B33A2B is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.2% C 0.159 H 30.3°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#B33A2B
RGB	rgb(179, 58, 43)
HSL	hsl(7, 61%, 44%)
HSV	hsv(7, 76%, 70%)
CMYK	cmyk(0%, 67.6%, 76%, 29.8%)
CIE-LAB	lab(42.44, 48.16, 36.15)
CIE-LCH	lch(42.44, 60.21, 36.89°)
OKLab	oklab(52.22% 0.1377 0.0804)
OKLCH	oklch(52.22% 0.159 30.3)
XYZ	xyz(20.5418, 12.7873, 3.6716)
Luminance	0.1278 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33A2B #2BA4B3

analogous

#B32B60 #B33A2B #B37E2B

triadic

#B33A2B #2BB33A #3A2BB3

tetradic

#B33A2B #60B32B #2BA4B3 #7E2BB3

square

#B33A2B #60B32B #2BA4B3 #7E2BB3

split-complementary

#B33A2B #2BB37E #2B60B3

monochromatic

#501A13 #822A1F #B33A2B #D35748 #DF8579

Accessibility & contrast

On white

5.90

#B33A2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#B33A2B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33A2B

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33A2B	#FFFFFF	#000000	##FFFFFF
##B33A2B	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)

#5C5328

Deuteranopia (green-blind)

#7B6E27

Tritanopia (blue-blind)

#C51537

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33a2b;
/* rgb */ color: rgb(179, 58, 43);
/* oklch */ color: oklch(52.2% 0.159 30.3);

Tailwind

colors: {
  custom: {
    50: '#d27765',
    500: '#b33a2b',
    950: '#000000',
  },
}

SCSS

$custom: #b33a2b;
$custom-light: #d27765;
$custom-dark: #000000;

JSON

{
  "hex": "#b33a2b",
  "rgb": {
    "r": 179,
    "g": 58,
    "b": 43
  },
  "hsl": {
    "h": 6.618,
    "s": 61.261,
    "l": 43.529
  },
  "oklch": {
    "l": 0.52222,
    "c": 0.15949,
    "h": 30.3
  },
  "luminance": 0.12784
}

Semantic roles & 50–950 ramp

primary

#B33A2B

secondary

#73BEC7

accent

#D3E443

background

#FEF7F6

surface

#FCEDEB

border

#D5C8C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B33A2B

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

Preview Lab → · Contrast checker → · Palette generator →