#CB403F#CB403F

#CB403F is a mid, vivid red. Relative luminance 0.167; OKLCH L 57.2% C 0.176 H 25.0°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#CB403F
RGB	rgb(203, 64, 63)
HSL	hsl(0, 57%, 52%)
HSV	hsv(0, 69%, 80%)
CMYK	cmyk(0%, 68.5%, 69%, 20.4%)
CIE-LAB	lab(47.91, 54.66, 32.07)
CIE-LCH	lch(47.91, 63.37, 30.40°)
OKLab	oklab(57.2% 0.1595 0.0743)
OKLCH	oklch(57.2% 0.176 25)
XYZ	xyz(27.3621, 16.7262, 6.4894)
Luminance	0.1672 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB403F #3FCACB

analogous

#CB3F84 #CB403F #CB863F

triadic

#CB403F #3FCB40 #403FCB

tetradic

#CB403F #84CB3F #3FCACB #863FCB

square

#CB403F #84CB3F #3FCACB #863FCB

split-complementary

#CB403F #3FCB86 #3F84CB

monochromatic

#711F1F #A12C2C #CB403F #D8706F #E5A09F

Accessibility & contrast

On white

4.83

#CB403F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#CB403F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB403F

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB403F	#FFFFFF	#000000	##FFFFFF
##CB403F	1.00	4.83	4.34	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#675F3E

Deuteranopia (green-blind)

#8A7D3B

Tritanopia (blue-blind)

#DF1641

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #cb403f;
/* rgb */ color: rgb(203, 64, 63);
/* oklch */ color: oklch(57.2% 0.176 25.0);

Tailwind

colors: {
  custom: {
    50: '#e37d74',
    500: '#cb403f',
    950: '#000000',
  },
}

SCSS

$custom: #cb403f;
$custom-light: #e37d74;
$custom-dark: #000000;

JSON

{
  "hex": "#cb403f",
  "rgb": {
    "r": 203,
    "g": 64,
    "b": 63
  },
  "hsl": {
    "h": 0.429,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.57203,
    "c": 0.17593,
    "h": 25
  },
  "luminance": 0.16722
}

Semantic roles & 50–950 ramp

primary

#CB403F

secondary

#94D1D1

accent

#E0E147

background

#FFF8F7

surface

#FEEFED

border

#D6CAC8

text

#170A08

muted

#857C7B

Preview Lab

Preview with #CB403F

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

Preview Lab → · Contrast checker → · Palette generator →