#CB4037#CB4037

#CB4037 is a mid, vivid red. Relative luminance 0.166; OKLCH L 57.1% C 0.177 H 27.8°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#CB4037
RGB	rgb(203, 64, 55)
HSL	hsl(4, 59%, 51%)
HSV	hsv(4, 73%, 80%)
CMYK	cmyk(0%, 68.5%, 72.9%, 20.4%)
CIE-LAB	lab(47.81, 54.28, 36.55)
CIE-LCH	lch(47.81, 65.44, 33.95°)
OKLab	oklab(57.09% 0.1566 0.0826)
OKLCH	oklch(57.09% 0.177 27.8)
XYZ	xyz(27.1546, 16.6432, 5.3963)
Luminance	0.1664 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB4037 #37C2CB

analogous

#CB3778 #CB4037 #CB8A37

triadic

#CB4037 #37CB40 #4037CB

tetradic

#CB4037 #78CB37 #37C2CB #8A37CB

square

#CB4037 #78CB37 #37C2CB #8A37CB

split-complementary

#CB4037 #37CB8A #3778CB

monochromatic

#6C211C #9C3029 #CB4037 #D86E68 #E49D98

Accessibility & contrast

On white

4.85

#CB4037 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#CB4037 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB4037

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB4037	#FFFFFF	#000000	##FFFFFF
##CB4037	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#685E35

Deuteranopia (green-blind)

#8A7D32

Tritanopia (blue-blind)

#DF133F

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #cb4037;
/* rgb */ color: rgb(203, 64, 55);
/* oklch */ color: oklch(57.1% 0.177 27.8);

Tailwind

colors: {
  custom: {
    50: '#e37d6e',
    500: '#cb4037',
    950: '#000000',
  },
}

SCSS

$custom: #cb4037;
$custom-light: #e37d6e;
$custom-dark: #000000;

JSON

{
  "hex": "#cb4037",
  "rgb": {
    "r": 203,
    "g": 64,
    "b": 55
  },
  "hsl": {
    "h": 3.649,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.5709,
    "c": 0.17707,
    "h": 27.8
  },
  "luminance": 0.16639
}

Semantic roles & 50–950 ramp

primary

#CB4037

secondary

#8ECCD0

accent

#D8E246

background

#FFF8F6

surface

#FEEFEC

border

#D6CAC7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB4037

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

Preview Lab → · Contrast checker → · Palette generator →