#B33739#B33739

#B33739 is a mid, vivid red. Relative luminance 0.126; OKLCH L 52.1% C 0.160 H 23.8°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#B33739
RGB	rgb(179, 55, 57)
HSL	hsl(359, 53%, 46%)
HSV	hsv(359, 69%, 70%)
CMYK	cmyk(0%, 69.3%, 68.2%, 29.8%)
CIE-LAB	lab(42.18, 50.05, 27.67)
CIE-LCH	lch(42.18, 57.19, 28.94°)
OKLab	oklab(52.08% 0.1466 0.0647)
OKLCH	oklch(52.08% 0.16 23.8)
XYZ	xyz(20.6973, 12.6145, 5.2151)
Luminance	0.1261 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33739 #37B3B1

analogous

#B33777 #B33739 #B37337

triadic

#B33739 #39B337 #3739B3

tetradic

#B33739 #77B337 #37B3B1 #7337B3

square

#B33739 #77B337 #37B3B1 #7337B3

split-complementary

#B33739 #37B373 #3777B3

monochromatic

#551A1B #84292A #B33739 #CD5B5D #DB8A8B

Accessibility & contrast

On white

5.96

#B33739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#B33739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33739

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33739	#FFFFFF	#000000	##FFFFFF
##B33739	1.00	5.96	3.52	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595338

Deuteranopia (green-blind)

#786D35

Tritanopia (blue-blind)

#C51239

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33739;
/* rgb */ color: rgb(179, 55, 57);
/* oklch */ color: oklch(52.1% 0.160 23.8);

Tailwind

colors: {
  custom: {
    50: '#d1766f',
    500: '#b33739',
    950: '#000000',
  },
}

SCSS

$custom: #b33739;
$custom-light: #d1766f;
$custom-dark: #000000;

JSON

{
  "hex": "#b33739",
  "rgb": {
    "r": 179,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.032,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52083,
    "c": 0.16024,
    "h": 23.8
  },
  "luminance": 0.12611
}

Semantic roles & 50–950 ramp

primary

#B33739

secondary

#81C5C4

accent

#DCDA4B

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33739

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

Preview Lab → · Contrast checker → · Palette generator →