#CB3937#CB3937

#CB3937 is a mid, vivid red. Relative luminance 0.159; OKLCH L 56.4% C 0.183 H 25.9°. Best body text is #FFFFFF at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#CB3937
RGB	rgb(203, 57, 55)
HSL	hsl(1, 59%, 51%)
HSV	hsv(1, 73%, 80%)
CMYK	cmyk(0%, 71.9%, 72.9%, 20.4%)
CIE-LAB	lab(46.85, 56.92, 35.46)
CIE-LCH	lch(46.85, 67.06, 31.92°)
OKLab	oklab(56.37% 0.1649 0.0802)
OKLCH	oklch(56.37% 0.183 25.9)
XYZ	xyz(26.7843, 15.9027, 5.2729)
Luminance	0.1590 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3937 #37C9CB

analogous

#CB377F #CB3937 #CB8337

triadic

#CB3937 #37CB39 #3937CB

tetradic

#CB3937 #7FCB37 #37C9CB #8337CB

square

#CB3937 #7FCB37 #37C9CB #8337CB

split-complementary

#CB3937 #37CB83 #377FCB

monochromatic

#6C1D1C #9C2A29 #CB3937 #D86968 #E49998

Accessibility & contrast

On white

5.02

#CB3937 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.18

#CB3937 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3937

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3937	#FFFFFF	#000000	##FFFFFF
##CB3937	1.00	5.02	4.18	5.02
#FFFFFF	5.02	1.00	21.00	1.00
#000000	4.18	21.00	1.00	21.00
##FFFFFF	5.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#645B35

Deuteranopia (green-blind)

#887B32

Tritanopia (blue-blind)

#DF003A

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #cb3937;
/* rgb */ color: rgb(203, 57, 55);
/* oklch */ color: oklch(56.4% 0.183 25.9);

Tailwind

colors: {
  custom: {
    50: '#e37a6e',
    500: '#cb3937',
    950: '#000000',
  },
}

SCSS

$custom: #cb3937;
$custom-light: #e37a6e;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3937",
  "rgb": {
    "r": 203,
    "g": 57,
    "b": 55
  },
  "hsl": {
    "h": 0.811,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56372,
    "c": 0.18341,
    "h": 25.9
  },
  "luminance": 0.15899
}

Semantic roles & 50–950 ramp

primary

#CB3937

secondary

#8ECFD0

accent

#E0E246

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3937

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

Preview Lab → · Contrast checker → · Palette generator →