#B33738#B33738

#B33738 is a mid, vivid red. Relative luminance 0.126; OKLCH L 52.1% C 0.160 H 24.2°. Best body text is #FFFFFF at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#B33738
RGB	rgb(179, 55, 56)
HSL	hsl(360, 53%, 46%)
HSV	hsv(360, 69%, 70%)
CMYK	cmyk(0%, 69.3%, 68.7%, 29.8%)
CIE-LAB	lab(42.16, 50.00, 28.25)
CIE-LCH	lch(42.16, 57.43, 29.47°)
OKLab	oklab(52.07% 0.1462 0.0658)
OKLCH	oklch(52.07% 0.16 24.2)
XYZ	xyz(20.6726, 12.6046, 5.0850)
Luminance	0.1260 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33738 #37B3B2

analogous

#B33776 #B33738 #B37437

triadic

#B33738 #38B337 #3738B3

tetradic

#B33738 #76B337 #37B3B2 #7437B3

square

#B33738 #76B337 #37B3B2 #7437B3

split-complementary

#B33738 #37B374 #3776B3

monochromatic

#551A1B #842929 #B33738 #CD5B5C #DB8A8A

Accessibility & contrast

On white

5.97

#B33738 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#B33738 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33738

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33738	#FFFFFF	#000000	##FFFFFF
##B33738	1.00	5.97	3.52	5.97
#FFFFFF	5.97	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595337

Deuteranopia (green-blind)

#786D34

Tritanopia (blue-blind)

#C51239

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b33738;
/* rgb */ color: rgb(179, 55, 56);
/* oklch */ color: oklch(52.1% 0.160 24.2);

Tailwind

colors: {
  custom: {
    50: '#d1766e',
    500: '#b33738',
    950: '#000000',
  },
}

SCSS

$custom: #b33738;
$custom-light: #d1766e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33738",
  "rgb": {
    "r": 179,
    "g": 55,
    "b": 56
  },
  "hsl": {
    "h": 359.516,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52067,
    "c": 0.16036,
    "h": 24.2
  },
  "luminance": 0.12602
}

Semantic roles & 50–950 ramp

primary

#B33738

secondary

#81C5C5

accent

#DCDB4B

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33738

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

Preview Lab → · Contrast checker → · Palette generator →