#CB0501#CB0501

#CB0501 is a mid, highly saturated red. Relative luminance 0.128; OKLCH L 53.0% C 0.216 H 29.4°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#CB0501
RGB	rgb(203, 5, 1)
HSL	hsl(1, 99%, 40%)
HSV	hsv(1, 100%, 80%)
CMYK	cmyk(0%, 97.5%, 99.5%, 20.4%)
CIE-LAB	lab(42.48, 66.98, 56.30)
CIE-LCH	lch(42.48, 87.49, 40.05°)
OKLab	oklab(53.01% 0.188 0.1059)
OKLCH	oklch(53.01% 0.216 29.4)
XYZ	xyz(24.6917, 12.8116, 1.2016)
Luminance	0.1281 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB0501 #01C7CB

analogous

#CB0162 #CB0501 #CB6A01

triadic

#CB0501 #01CB05 #0501CB

tetradic

#CB0501 #62CB01 #01C7CB #6A01CB

square

#CB0501 #62CB01 #01C7CB #6A01CB

split-complementary

#CB0501 #01CB6A #0162CB

monochromatic

#510200 #8E0301 #CB0501 #FE100B #FE4C48

Accessibility & contrast

On white

5.90

#CB0501 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#CB0501 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB0501

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB0501	#FFFFFF	#000000	##FFFFFF
##CB0501	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#564B00

Deuteranopia (green-blind)

#817200

Tritanopia (blue-blind)

#E1000D

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #cb0501;
/* rgb */ color: rgb(203, 5, 1);
/* oklch */ color: oklch(53.0% 0.216 29.4);

Tailwind

colors: {
  custom: {
    50: '#e76a4d',
    500: '#cb0501',
    950: '#000000',
  },
}

SCSS

$custom: #cb0501;
$custom-light: #e76a4d;
$custom-dark: #000000;

JSON

{
  "hex": "#cb0501",
  "rgb": {
    "r": 203,
    "g": 5,
    "b": 1
  },
  "hsl": {
    "h": 1.188,
    "s": 99.02,
    "l": 40
  },
  "oklch": {
    "l": 0.53007,
    "c": 0.21578,
    "h": 29.4
  },
  "luminance": 0.12807
}

Semantic roles & 50–950 ramp

primary

#CB0501

secondary

#4ADBDE

accent

#FBFF29

background

#FFF7F4

surface

#FFEDE7

border

#D7C8C3

text

#190802

muted

#867B78

Preview Lab

Preview with #CB0501

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

Preview Lab → · Contrast checker → · Palette generator →