#B33728#B33728

#B33728 is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.8% C 0.163 H 30.3°. Best body text is #FFFFFF at 6.01:1 contrast (WCAG AA passes).

Color values

HEX	#B33728
RGB	rgb(179, 55, 40)
HSL	hsl(6, 63%, 43%)
HSV	hsv(6, 78%, 70%)
CMYK	cmyk(0%, 69.3%, 77.7%, 29.8%)
CIE-LAB	lab(41.96, 49.27, 37.30)
CIE-LCH	lch(41.96, 61.79, 37.13°)
OKLab	oklab(51.85% 0.1406 0.0821)
OKLCH	oklch(51.85% 0.163 30.3)
XYZ	xyz(20.3419, 12.4723, 3.3434)
Luminance	0.1247 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B33728 #28A4B3

analogous

#B3285E #B33728 #B37C28

triadic

#B33728 #28B337 #3728B3

tetradic

#B33728 #5EB328 #28A4B3 #7C28B3

square

#B33728 #5EB328 #28A4B3 #7C28B3

split-complementary

#B33728 #28B37C #285EB3

monochromatic

#4F1812 #81281D #B33728 #D55343 #E08175

Accessibility & contrast

On white

6.01

#B33728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#B33728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B33728

6.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B33728	#FFFFFF	#000000	##FFFFFF
##B33728	1.00	6.01	3.49	6.01
#FFFFFF	6.01	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5225

Deuteranopia (green-blind)

#7A6D23

Tritanopia (blue-blind)

#C50B35

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #b33728;
/* rgb */ color: rgb(179, 55, 40);
/* oklch */ color: oklch(51.8% 0.163 30.3);

Tailwind

colors: {
  custom: {
    50: '#d27563',
    500: '#b33728',
    950: '#000000',
  },
}

SCSS

$custom: #b33728;
$custom-light: #d27563;
$custom-dark: #000000;

JSON

{
  "hex": "#b33728",
  "rgb": {
    "r": 179,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.475,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.51849,
    "c": 0.16282,
    "h": 30.3
  },
  "luminance": 0.12469
}

Semantic roles & 50–950 ramp

primary

#B33728

secondary

#6FBEC8

accent

#D5E641

background

#FEF7F5

surface

#FCEDEA

border

#D5C8C6

text

#160905

muted

#847B79

Preview Lab

Preview with #B33728

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

Preview Lab → · Contrast checker → · Palette generator →