#B33D37#B33D37

#B33D37 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.7% C 0.154 H 26.7°. Best body text is #FFFFFF at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#B33D37
RGB	rgb(179, 61, 55)
HSL	hsl(3, 53%, 46%)
HSV	hsv(3, 69%, 70%)
CMYK	cmyk(0%, 65.9%, 69.3%, 29.8%)
CIE-LAB	lab(43.06, 47.45, 29.94)
CIE-LCH	lch(43.06, 56.11, 32.25°)
OKLab	oklab(52.74% 0.138 0.0694)
OKLCH	oklch(52.74% 0.154 26.7)
XYZ	xyz(20.9509, 13.2000, 5.0583)
Luminance	0.1320 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33D37 #37ADB3

analogous

#B3376F #B33D37 #B37B37

triadic

#B33D37 #37B33D #3D37B3

tetradic

#B33D37 #6FB337 #37ADB3 #7B37B3

square

#B33D37 #6FB337 #37ADB3 #7B37B3

split-complementary

#B33D37 #37B37B #376FB3

monochromatic

#551D1A #842D29 #B33D37 #CD605B #DB8D8A

Accessibility & contrast

On white

5.77

#B33D37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#B33D37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33D37

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33D37	#FFFFFF	#000000	##FFFFFF
##B33D37	1.00	5.77	3.64	5.77
#FFFFFF	5.77	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5635

Deuteranopia (green-blind)

#7B6F33

Tritanopia (blue-blind)

#C51F3D

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b33d37;
/* rgb */ color: rgb(179, 61, 55);
/* oklch */ color: oklch(52.7% 0.154 26.7);

Tailwind

colors: {
  custom: {
    50: '#d1796e',
    500: '#b33d37',
    950: '#000000',
  },
}

SCSS

$custom: #b33d37;
$custom-light: #d1796e;
$custom-dark: #000000;

JSON

{
  "hex": "#b33d37",
  "rgb": {
    "r": 179,
    "g": 61,
    "b": 55
  },
  "hsl": {
    "h": 2.903,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.52738,
    "c": 0.15445,
    "h": 26.7
  },
  "luminance": 0.13197
}

Semantic roles & 50–950 ramp

primary

#B33D37

secondary

#81C2C5

accent

#D5DC4B

background

#FDF7F6

surface

#FBEEEB

border

#D4C9C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #B33D37

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

Preview Lab → · Contrast checker → · Palette generator →