#B33B37#B33B37

#B33B37 is a mid, vivid red. Relative luminance 0.130; OKLCH L 52.5% C 0.156 H 26.0°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#B33B37
RGB	rgb(179, 59, 55)
HSL	hsl(2, 53%, 46%)
HSV	hsv(2, 69%, 70%)
CMYK	cmyk(0%, 67%, 69.3%, 29.8%)
CIE-LAB	lab(42.75, 48.30, 29.56)
CIE-LCH	lch(42.75, 56.63, 31.46°)
OKLab	oklab(52.5% 0.1407 0.0685)
OKLCH	oklch(52.5% 0.156 26)
XYZ	xyz(20.8462, 12.9905, 5.0234)
Luminance	0.1299 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33B37 #37AFB3

analogous

#B33771 #B33B37 #B37937

triadic

#B33B37 #37B33B #3B37B3

tetradic

#B33B37 #71B337 #37AFB3 #7937B3

square

#B33B37 #71B337 #37AFB3 #7937B3

split-complementary

#B33B37 #37B379 #3771B3

monochromatic

#551C1A #842C29 #B33B37 #CD5E5B #DB8C8A

Accessibility & contrast

On white

5.84

#B33B37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#B33B37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33B37

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33B37	#FFFFFF	#000000	##FFFFFF
##B33B37	1.00	5.84	3.60	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5536

Deuteranopia (green-blind)

#7A6F33

Tritanopia (blue-blind)

#C51B3B

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b33b37;
/* rgb */ color: rgb(179, 59, 55);
/* oklch */ color: oklch(52.5% 0.156 26.0);

Tailwind

colors: {
  custom: {
    50: '#d1786e',
    500: '#b33b37',
    950: '#000000',
  },
}

SCSS

$custom: #b33b37;
$custom-light: #d1786e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33b37",
  "rgb": {
    "r": 179,
    "g": 59,
    "b": 55
  },
  "hsl": {
    "h": 1.935,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52502,
    "c": 0.15648,
    "h": 26
  },
  "luminance": 0.12987
}

Semantic roles & 50–950 ramp

primary

#B33B37

secondary

#81C3C5

accent

#D8DC4B

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33B37

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

Preview Lab → · Contrast checker → · Palette generator →