#B63A31#B63A31

#B63A31 is a mid, vivid red. Relative luminance 0.132; OKLCH L 52.8% C 0.162 H 28.1°. Best body text is #FFFFFF at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#B63A31
RGB	rgb(182, 58, 49)
HSL	hsl(4, 58%, 45%)
HSV	hsv(4, 73%, 71%)
CMYK	cmyk(0%, 68.1%, 73.1%, 28.6%)
CIE-LAB	lab(43.06, 49.44, 33.57)
CIE-LCH	lch(43.06, 59.76, 34.18°)
OKLab	oklab(52.81% 0.1426 0.076)
OKLCH	oklch(52.81% 0.162 28.1)
XYZ	xyz(21.3612, 13.1961, 4.3274)
Luminance	0.1319 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63A31 #31ADB6

analogous

#B6316B #B63A31 #B67C31

triadic

#B63A31 #31B63A #3A31B6

tetradic

#B63A31 #6BB631 #31ADB6 #7C31B6

square

#B63A31 #6BB631 #31ADB6 #7C31B6

split-complementary

#B63A31 #31B67C #316BB6

monochromatic

#561B17 #862B24 #B63A31 #D15C53 #DE8A84

Accessibility & contrast

On white

5.77

#B63A31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#B63A31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63A31

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63A31	#FFFFFF	#000000	##FFFFFF
##B63A31	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)

#5D552F

Deuteranopia (green-blind)

#7C702D

Tritanopia (blue-blind)

#C81439

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #b63a31;
/* rgb */ color: rgb(182, 58, 49);
/* oklch */ color: oklch(52.8% 0.162 28.1);

Tailwind

colors: {
  custom: {
    50: '#d47769',
    500: '#b63a31',
    950: '#000000',
  },
}

SCSS

$custom: #b63a31;
$custom-light: #d47769;
$custom-dark: #000000;

JSON

{
  "hex": "#b63a31",
  "rgb": {
    "r": 182,
    "g": 58,
    "b": 49
  },
  "hsl": {
    "h": 4.06,
    "s": 57.576,
    "l": 45.294
  },
  "oklch": {
    "l": 0.52808,
    "c": 0.16164,
    "h": 28.1
  },
  "luminance": 0.13193
}

Semantic roles & 50–950 ramp

primary

#B63A31

secondary

#7CC2C7

accent

#D6E147

background

#FEF7F6

surface

#FCEEEB

border

#D5C9C6

text

#160906

muted

#847B7A

Preview Lab

Preview with #B63A31

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

Preview Lab → · Contrast checker → · Palette generator →