#B33A31#B33A31

#B33A31 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.3% C 0.158 H 28.1°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#B33A31
RGB	rgb(179, 58, 49)
HSL	hsl(4, 57%, 45%)
HSV	hsv(4, 73%, 70%)
CMYK	cmyk(0%, 67.6%, 72.6%, 29.8%)
CIE-LAB	lab(42.51, 48.42, 32.80)
CIE-LCH	lch(42.51, 58.49, 34.12°)
OKLab	oklab(52.3% 0.1398 0.0745)
OKLCH	oklch(52.3% 0.158 28.1)
XYZ	xyz(20.6601, 12.8346, 4.2946)
Luminance	0.1283 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33A31 #31AAB3

analogous

#B33169 #B33A31 #B37B31

triadic

#B33A31 #31B33A #3A31B3

tetradic

#B33A31 #69B331 #31AAB3 #7B31B3

square

#B33A31 #69B331 #31AAB3 #7B31B3

split-complementary

#B33A31 #31B37B #3169B3

monochromatic

#531B17 #832A24 #B33A31 #D05A52 #DD8882

Accessibility & contrast

On white

5.89

#B33A31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#B33A31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33A31

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33A31	#FFFFFF	#000000	##FFFFFF
##B33A31	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C542F

Deuteranopia (green-blind)

#7A6E2D

Tritanopia (blue-blind)

#C51739

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33a31;
/* rgb */ color: rgb(179, 58, 49);
/* oklch */ color: oklch(52.3% 0.158 28.1);

Tailwind

colors: {
  custom: {
    50: '#d17769',
    500: '#b33a31',
    950: '#000000',
  },
}

SCSS

$custom: #b33a31;
$custom-light: #d17769;
$custom-dark: #000000;

JSON

{
  "hex": "#b33a31",
  "rgb": {
    "r": 179,
    "g": 58,
    "b": 49
  },
  "hsl": {
    "h": 4.154,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.52299,
    "c": 0.15843,
    "h": 28.1
  },
  "luminance": 0.12832
}

Semantic roles & 50–950 ramp

primary

#B33A31

secondary

#7AC1C6

accent

#D6E048

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #B33A31

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

Preview Lab → · Contrast checker → · Palette generator →