#C91B1B#C91B1B

#C91B1B is a mid, highly saturated red. Relative luminance 0.133; OKLCH L 53.5% C 0.205 H 27.9°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#C91B1B
RGB	rgb(201, 27, 27)
HSL	hsl(0, 76%, 45%)
HSV	hsv(0, 87%, 79%)
CMYK	cmyk(0%, 86.6%, 86.6%, 21.2%)
CIE-LAB	lab(43.19, 63.86, 46.75)
CIE-LCH	lch(43.19, 79.15, 36.21°)
OKLab	oklab(53.5% 0.1815 0.0959)
OKLCH	oklch(53.5% 0.205 27.9)
XYZ	xyz(24.6804, 13.2847, 2.3014)
Luminance	0.1328 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C91B1B #1BC9C9

analogous

#C91B72 #C91B1B #C9721B

triadic

#C91B1B #1BC91B #1B1BC9

tetradic

#C91B1B #72C91B #1BC9C9 #721BC9

square

#C91B1B #72C91B #1BC9C9 #721BC9

split-complementary

#C91B1B #1BC972 #1B72C9

monochromatic

#5D0D0D #931414 #C91B1B #E53C3C #EC7272

Accessibility & contrast

On white

5.74

#C91B1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#C91B1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C91B1B

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C91B1B	#FFFFFF	#000000	##FFFFFF
##C91B1B	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#584E17

Deuteranopia (green-blind)

#82730D

Tritanopia (blue-blind)

#DE001F

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #c91b1b;
/* rgb */ color: rgb(201, 27, 27);
/* oklch */ color: oklch(53.5% 0.205 27.9);

Tailwind

colors: {
  custom: {
    50: '#e56e5a',
    500: '#c91b1b',
    950: '#000000',
  },
}

SCSS

$custom: #c91b1b;
$custom-light: #e56e5a;
$custom-dark: #000000;

JSON

{
  "hex": "#c91b1b",
  "rgb": {
    "r": 201,
    "g": 27,
    "b": 27
  },
  "hsl": {
    "h": 0,
    "s": 76.316,
    "l": 44.706
  },
  "oklch": {
    "l": 0.53497,
    "c": 0.2053,
    "h": 27.9
  },
  "luminance": 0.13281
}

Semantic roles & 50–950 ramp

primary

#C91B1B

secondary

#6DD3D3

accent

#F3F335

background

#FFF7F5

surface

#FFEDE9

border

#D7C8C5

text

#180804

muted

#867B79

Preview Lab

Preview with #C91B1B

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

Preview Lab → · Contrast checker → · Palette generator →