#B63728#B63728

#B63728 is a mid, vivid red. Relative luminance 0.128; OKLCH L 52.4% C 0.166 H 30.2°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#B63728
RGB	rgb(182, 55, 40)
HSL	hsl(6, 64%, 44%)
HSV	hsv(6, 78%, 71%)
CMYK	cmyk(0%, 69.8%, 78%, 28.6%)
CIE-LAB	lab(42.51, 50.27, 38.05)
CIE-LCH	lch(42.51, 63.05, 37.12°)
OKLab	oklab(52.37% 0.1434 0.0835)
OKLCH	oklch(52.37% 0.166 30.2)
XYZ	xyz(21.0430, 12.8338, 3.3762)
Luminance	0.1283 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63728 #28A7B6

analogous

#B62860 #B63728 #B67E28

triadic

#B63728 #28B637 #3728B6

tetradic

#B63728 #60B628 #28A7B6 #7E28B6

square

#B63728 #60B628 #28A7B6 #7E28B6

split-complementary

#B63728 #28B67E #2860B6

monochromatic

#521912 #84281D #B63728 #D65445 #E18277

Accessibility & contrast

On white

5.89

#B63728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#B63728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63728

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63728	#FFFFFF	#000000	##FFFFFF
##B63728	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5325

Deuteranopia (green-blind)

#7C6F23

Tritanopia (blue-blind)

#C80735

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #b63728;
/* rgb */ color: rgb(182, 55, 40);
/* oklch */ color: oklch(52.4% 0.166 30.2);

Tailwind

colors: {
  custom: {
    50: '#d47663',
    500: '#b63728',
    950: '#000000',
  },
}

SCSS

$custom: #b63728;
$custom-light: #d47663;
$custom-dark: #000000;

JSON

{
  "hex": "#b63728",
  "rgb": {
    "r": 182,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.338,
    "s": 63.964,
    "l": 43.529
  },
  "oklch": {
    "l": 0.52366,
    "c": 0.16596,
    "h": 30.2
  },
  "luminance": 0.12831
}

Semantic roles & 50–950 ramp

primary

#B63728

secondary

#71C0C9

accent

#D5E741

background

#FEF7F5

surface

#FCEDEA

border

#D5C8C6

text

#160905

muted

#847B79

Preview Lab

Preview with #B63728

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

Preview Lab → · Contrast checker → · Palette generator →