#CB3F37#CB3F37

#CB3F37 is a mid, vivid red. Relative luminance 0.165; OKLCH L 57.0% C 0.178 H 27.5°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#CB3F37
RGB	rgb(203, 63, 55)
HSL	hsl(3, 59%, 51%)
HSV	hsv(3, 73%, 80%)
CMYK	cmyk(0%, 69%, 72.9%, 20.4%)
CIE-LAB	lab(47.66, 54.67, 36.39)
CIE-LCH	lch(47.66, 65.67, 33.65°)
OKLab	oklab(56.98% 0.1579 0.0823)
OKLCH	oklch(56.98% 0.178 27.5)
XYZ	xyz(27.0987, 16.5314, 5.3777)
Luminance	0.1653 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3F37 #37C3CB

analogous

#CB3779 #CB3F37 #CB8937

triadic

#CB3F37 #37CB3F #3F37CB

tetradic

#CB3F37 #79CB37 #37C3CB #8937CB

square

#CB3F37 #79CB37 #37C3CB #8937CB

split-complementary

#CB3F37 #37CB89 #3779CB

monochromatic

#6C201C #9C2F29 #CB3F37 #D86E68 #E49C98

Accessibility & contrast

On white

4.88

#CB3F37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#CB3F37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3F37

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3F37	#FFFFFF	#000000	##FFFFFF
##CB3F37	1.00	4.88	4.31	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#675E35

Deuteranopia (green-blind)

#8A7C32

Tritanopia (blue-blind)

#DF103E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #cb3f37;
/* rgb */ color: rgb(203, 63, 55);
/* oklch */ color: oklch(57.0% 0.178 27.5);

Tailwind

colors: {
  custom: {
    50: '#e37c6e',
    500: '#cb3f37',
    950: '#000000',
  },
}

SCSS

$custom: #cb3f37;
$custom-light: #e37c6e;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3f37",
  "rgb": {
    "r": 203,
    "g": 63,
    "b": 55
  },
  "hsl": {
    "h": 3.243,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56983,
    "c": 0.17799,
    "h": 27.5
  },
  "luminance": 0.16527
}

Semantic roles & 50–950 ramp

primary

#CB3F37

secondary

#8ECCD0

accent

#D9E246

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3F37

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

Preview Lab → · Contrast checker → · Palette generator →