#CB3633#CB3633

#CB3633 is a mid, vivid red. Relative luminance 0.156; OKLCH L 56.0% C 0.187 H 26.5°. Best body text is #FFFFFF at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#CB3633
RGB	rgb(203, 54, 51)
HSL	hsl(1, 60%, 50%)
HSV	hsv(1, 75%, 80%)
CMYK	cmyk(0%, 73.4%, 74.9%, 20.4%)
CIE-LAB	lab(46.42, 57.81, 37.26)
CIE-LCH	lch(46.42, 68.77, 32.80°)
OKLab	oklab(56.04% 0.1669 0.0832)
OKLCH	oklch(56.04% 0.187 26.5)
XYZ	xyz(26.5484, 15.5780, 4.7403)
Luminance	0.1557 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3633 #33C8CB

analogous

#CB337C #CB3633 #CB8233

triadic

#CB3633 #33CB36 #3633CB

tetradic

#CB3633 #7CCB33 #33C8CB #8233CB

square

#CB3633 #7CCB33 #33C8CB #8233CB

split-complementary

#CB3633 #33CB82 #337CCB

monochromatic

#691C1A #9A2927 #CB3633 #D86663 #E49694

Accessibility & contrast

On white

5.10

#CB3633 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#CB3633 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3633

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3633	#FFFFFF	#000000	##FFFFFF
##CB3633	1.00	5.10	4.11	5.10
#FFFFFF	5.10	1.00	21.00	1.00
#000000	4.11	21.00	1.00	21.00
##FFFFFF	5.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625931

Deuteranopia (green-blind)

#877A2D

Tritanopia (blue-blind)

#DF0037

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #cb3633;
/* rgb */ color: rgb(203, 54, 51);
/* oklch */ color: oklch(56.0% 0.187 26.5);

Tailwind

colors: {
  custom: {
    50: '#e4786b',
    500: '#cb3633',
    950: '#000000',
  },
}

SCSS

$custom: #cb3633;
$custom-light: #e4786b;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3633",
  "rgb": {
    "r": 203,
    "g": 54,
    "b": 51
  },
  "hsl": {
    "h": 1.184,
    "s": 59.843,
    "l": 49.804
  },
  "oklch": {
    "l": 0.56035,
    "c": 0.18651,
    "h": 26.5
  },
  "luminance": 0.15574
}

Semantic roles & 50–950 ramp

primary

#CB3633

secondary

#8BCECF

accent

#E0E345

background

#FFF7F6

surface

#FFEEEB

border

#D7C9C6

text

#170A06

muted

#857C7A

Preview Lab

Preview with #CB3633

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

Preview Lab → · Contrast checker → · Palette generator →