#B63B3F#B63B3F

#B63B3F is a mid, vivid red. Relative luminance 0.134; OKLCH L 53.1% C 0.159 H 22.6°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#B63B3F
RGB	rgb(182, 59, 63)
HSL	hsl(358, 51%, 47%)
HSV	hsv(358, 68%, 71%)
CMYK	cmyk(0%, 67.6%, 65.4%, 28.6%)
CIE-LAB	lab(43.41, 49.77, 25.70)
CIE-LCH	lch(43.41, 56.01, 27.31°)
OKLab	oklab(53.14% 0.1466 0.0609)
OKLCH	oklch(53.14% 0.159 22.6)
XYZ	xyz(21.7548, 13.4350, 6.1493)
Luminance	0.1343 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B63B3F #3BB6B2

analogous

#B63B7C #B63B3F #B6753B

triadic

#B63B3F #3FB63B #3B3FB6

tetradic

#B63B3F #7CB63B #3BB6B2 #753BB6

square

#B63B3F #7CB63B #3BB6B2 #753BB6

split-complementary

#B63B3F #3BB675 #3B7CB6

monochromatic

#5A1D1F #882C2F #B63B3F #CC6266 #DB9093

Accessibility & contrast

On white

5.70

#B63B3F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#B63B3F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B63B3F

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B63B3F	#FFFFFF	#000000	##FFFFFF
##B63B3F	1.00	5.70	3.69	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C563E

Deuteranopia (green-blind)

#7B703C

Tritanopia (blue-blind)

#C81C3E

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #b63b3f;
/* rgb */ color: rgb(182, 59, 63);
/* oklch */ color: oklch(53.1% 0.159 22.6);

Tailwind

colors: {
  custom: {
    50: '#d37874',
    500: '#b63b3f',
    950: '#000000',
  },
}

SCSS

$custom: #b63b3f;
$custom-light: #d37874;
$custom-dark: #000000;

JSON

{
  "hex": "#b63b3f",
  "rgb": {
    "r": 182,
    "g": 59,
    "b": 63
  },
  "hsl": {
    "h": 358.049,
    "s": 51.037,
    "l": 47.255
  },
  "oklch": {
    "l": 0.53138,
    "c": 0.15873,
    "h": 22.6
  },
  "luminance": 0.13432
}

Semantic roles & 50–950 ramp

primary

#B63B3F

secondary

#87C6C4

accent

#DBD64D

background

#FDF7F7

surface

#FBEEED

border

#D4C9C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #B63B3F

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

Preview Lab → · Contrast checker → · Palette generator →