#CB3737#CB3737

#CB3737 is a mid, vivid red. Relative luminance 0.157; OKLCH L 56.2% C 0.185 H 25.5°. Best body text is #FFFFFF at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#CB3737
RGB	rgb(203, 55, 55)
HSL	hsl(0, 59%, 51%)
HSV	hsv(0, 73%, 80%)
CMYK	cmyk(0%, 72.9%, 72.9%, 20.4%)
CIE-LAB	lab(46.59, 57.63, 35.16)
CIE-LCH	lch(46.59, 67.51, 31.39°)
OKLab	oklab(56.18% 0.1672 0.0796)
OKLCH	oklch(56.18% 0.185 25.5)
XYZ	xyz(26.6874, 15.7088, 5.2406)
Luminance	0.1570 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3737 #37CBCB

analogous

#CB3781 #CB3737 #CB8137

triadic

#CB3737 #37CB37 #3737CB

tetradic

#CB3737 #81CB37 #37CBCB #8137CB

square

#CB3737 #81CB37 #37CBCB #8137CB

split-complementary

#CB3737 #37CB81 #3781CB

monochromatic

#6C1C1C #9C2929 #CB3737 #D86868 #E49898

Accessibility & contrast

On white

5.07

#CB3737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.14

#CB3737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3737

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3737	#FFFFFF	#000000	##FFFFFF
##CB3737	1.00	5.07	4.14	5.07
#FFFFFF	5.07	1.00	21.00	1.00
#000000	4.14	21.00	1.00	21.00
##FFFFFF	5.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625A35

Deuteranopia (green-blind)

#877A32

Tritanopia (blue-blind)

#DF0039

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #cb3737;
/* rgb */ color: rgb(203, 55, 55);
/* oklch */ color: oklch(56.2% 0.185 25.5);

Tailwind

colors: {
  custom: {
    50: '#e4796e',
    500: '#cb3737',
    950: '#000000',
  },
}

SCSS

$custom: #cb3737;
$custom-light: #e4796e;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3737",
  "rgb": {
    "r": 203,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56181,
    "c": 0.18516,
    "h": 25.5
  },
  "luminance": 0.15705
}

Semantic roles & 50–950 ramp

primary

#CB3737

secondary

#8ED0D0

accent

#E2E246

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3737

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

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