#B33A28#B33A28

#B33A28 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.2% C 0.160 H 31.3°. Best body text is #FFFFFF at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#B33A28
RGB	rgb(179, 58, 40)
HSL	hsl(8, 63%, 43%)
HSV	hsv(8, 78%, 70%)
CMYK	cmyk(0%, 67.6%, 77.7%, 29.8%)
CIE-LAB	lab(42.41, 48.04, 37.77)
CIE-LCH	lch(42.41, 61.11, 38.18°)
OKLab	oklab(52.19% 0.1368 0.0831)
OKLCH	oklch(52.19% 0.16 31.3)
XYZ	xyz(20.4888, 12.7661, 3.3923)
Luminance	0.1276 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33A28 #28A1B3

analogous

#B3285B #B33A28 #B37F28

triadic

#B33A28 #28B33A #3A28B3

tetradic

#B33A28 #5BB328 #28A1B3 #7F28B3

square

#B33A28 #5BB328 #28A1B3 #7F28B3

split-complementary

#B33A28 #28B37F #285BB3

monochromatic

#4F1A12 #812A1D #B33A28 #D55643 #E08375

Accessibility & contrast

On white

5.91

#B33A28 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#B33A28 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33A28

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33A28	#FFFFFF	#000000	##FFFFFF
##B33A28	1.00	5.91	3.55	5.91
#FFFFFF	5.91	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D5325

Deuteranopia (green-blind)

#7B6E23

Tritanopia (blue-blind)

#C51437

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b33a28;
/* rgb */ color: rgb(179, 58, 40);
/* oklch */ color: oklch(52.2% 0.160 31.3);

Tailwind

colors: {
  custom: {
    50: '#d27763',
    500: '#b33a28',
    950: '#000000',
  },
}

SCSS

$custom: #b33a28;
$custom-light: #d27763;
$custom-dark: #000000;

JSON

{
  "hex": "#b33a28",
  "rgb": {
    "r": 179,
    "g": 58,
    "b": 40
  },
  "hsl": {
    "h": 7.77,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.52187,
    "c": 0.16006,
    "h": 31.3
  },
  "luminance": 0.12763
}

Semantic roles & 50–950 ramp

primary

#B33A28

secondary

#6FBCC8

accent

#D1E641

background

#FEF7F5

surface

#FCEDEA

border

#D5C8C6

text

#160905

muted

#847B79

Preview Lab

Preview with #B33A28

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

Preview Lab → · Contrast checker → · Palette generator →