#B1303F#B1303F

#B1303F is a mid, vivid red. Relative luminance 0.118; OKLCH L 51.1% C 0.165 H 19.0°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#B1303F
RGB	rgb(177, 48, 63)
HSL	hsl(353, 57%, 44%)
HSV	hsv(353, 73%, 69%)
CMYK	cmyk(0%, 72.9%, 64.4%, 30.6%)
CIE-LAB	lab(40.93, 52.43, 22.37)
CIE-LCH	lch(40.93, 57.00, 23.10°)
OKLab	oklab(51.12% 0.1557 0.0536)
OKLCH	oklch(51.12% 0.165 19)
XYZ	xyz(20.0877, 11.8228, 5.9260)
Luminance	0.1182 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B1303F #30B1A2

analogous

#B13080 #B1303F #B16230

triadic

#B1303F #3FB130 #303FB1

tetradic

#B1303F #80B130 #30B1A2 #6230B1

square

#B1303F #80B130 #30B1A2 #6230B1

split-complementary

#B1303F #30B162 #3080B1

monochromatic

#51161D #81232E #B1303F #CF4F5E #DC7F8A

Accessibility & contrast

On white

6.24

#B1303F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#B1303F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B1303F

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B1303F	#FFFFFF	#000000	##FFFFFF
##B1303F	1.00	6.24	3.36	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544F3F

Deuteranopia (green-blind)

#746A3B

Tritanopia (blue-blind)

#C20137

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #b1303f;
/* rgb */ color: rgb(177, 48, 63);
/* oklch */ color: oklch(51.1% 0.165 19.0);

Tailwind

colors: {
  custom: {
    50: '#cf7273',
    500: '#b1303f',
    950: '#000000',
  },
}

SCSS

$custom: #b1303f;
$custom-light: #cf7273;
$custom-dark: #000000;

JSON

{
  "hex": "#b1303f",
  "rgb": {
    "r": 177,
    "g": 48,
    "b": 63
  },
  "hsl": {
    "h": 353.023,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.5112,
    "c": 0.16463,
    "h": 19
  },
  "luminance": 0.1182
}

Semantic roles & 50–950 ramp

primary

#B1303F

secondary

#78C5BC

accent

#E1CF47

background

#FDF7F7

surface

#FBEDED

border

#D4C8C8

text

#150808

muted

#837B7B

Preview Lab

Preview with #B1303F

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

Preview Lab → · Contrast checker → · Palette generator →