#B33D3F#B33D3F

#B33D3F is a mid, vivid red. Relative luminance 0.133; OKLCH L 52.9% C 0.153 H 23.1°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#B33D3F
RGB	rgb(179, 61, 63)
HSL	hsl(359, 49%, 47%)
HSV	hsv(359, 66%, 70%)
CMYK	cmyk(0%, 65.9%, 64.8%, 29.8%)
CIE-LAB	lab(43.19, 47.92, 25.30)
CIE-LCH	lch(43.19, 54.19, 27.84°)
OKLab	oklab(52.87% 0.1411 0.0601)
OKLCH	oklch(52.87% 0.153 23.1)
XYZ	xyz(21.1585, 13.2830, 6.1514)
Luminance	0.1328 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33D3F #3DB3B1

analogous

#B33D7A #B33D3F #B3763D

triadic

#B33D3F #3FB33D #3D3FB3

tetradic

#B33D3F #7AB33D #3DB3B1 #763DB3

square

#B33D3F #7AB33D #3DB3B1 #763DB3

split-complementary

#B33D3F #3DB376 #3D7AB3

monochromatic

#581E1F #852D2F #B33D3F #CA6365 #D99192

Accessibility & contrast

On white

5.74

#B33D3F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#B33D3F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33D3F

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33D3F	#FFFFFF	#000000	##FFFFFF
##B33D3F	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C563E

Deuteranopia (green-blind)

#7A6F3C

Tritanopia (blue-blind)

#C4213F

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b33d3f;
/* rgb */ color: rgb(179, 61, 63);
/* oklch */ color: oklch(52.9% 0.153 23.1);

Tailwind

colors: {
  custom: {
    50: '#d07974',
    500: '#b33d3f',
    950: '#000000',
  },
}

SCSS

$custom: #b33d3f;
$custom-light: #d07974;
$custom-dark: #000000;

JSON

{
  "hex": "#b33d3f",
  "rgb": {
    "r": 179,
    "g": 61,
    "b": 63
  },
  "hsl": {
    "h": 358.983,
    "s": 49.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.5287,
    "c": 0.15336,
    "h": 23.1
  },
  "luminance": 0.1328
}

Semantic roles & 50–950 ramp

primary

#B33D3F

secondary

#87C5C4

accent

#D9D64F

background

#FDF7F7

surface

#FBEEED

border

#D4C9C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #B33D3F

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

Preview Lab → · Contrast checker → · Palette generator →