#280303#280303

#280303 is a very dark, moderate red. Relative luminance 0.005; OKLCH L 18.1% C 0.064 H 26.4°. Best body text is #FFFFFF at 19.01:1 contrast (WCAG AA passes).

Color values

HEX	#280303
RGB	rgb(40, 3, 3)
HSL	hsl(0, 86%, 8%)
HSV	hsv(0, 93%, 16%)
CMYK	cmyk(0%, 92.5%, 92.5%, 84.3%)
CIE-LAB	lab(4.72, 17.39, 6.17)
CIE-LCH	lch(4.72, 18.45, 19.52°)
OKLab	oklab(18.13% 0.0573 0.0285)
OKLCH	oklch(18.13% 0.064 26.4)
XYZ	xyz(0.9242, 0.5230, 0.1384)
Luminance	0.0052 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#280303 #032828

analogous

#280315 #280303 #281503

triadic

#280303 #032803 #030328

tetradic

#280303 #152803 #032828 #150328

square

#280303 #152803 #032828 #150328

split-complementary

#280303 #032815 #031528

monochromatic

#1C0202 #1C0202 #280303 #610707 #9A0C0C

Accessibility & contrast

On white

19.01

#280303 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#280303 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #280303

19.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##280303	#FFFFFF	#000000	##FFFFFF
##280303	1.00	19.01	1.10	19.01
#FFFFFF	19.01	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D0B03

Deuteranopia (green-blind)

#171302

Tritanopia (blue-blind)

#2D0003

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #280303;
/* rgb */ color: rgb(40, 3, 3);
/* oklch */ color: oklch(18.1% 0.064 26.4);

Tailwind

colors: {
  custom: {
    50: '#634748',
    500: '#280303',
    950: '#000000',
  },
}

SCSS

$custom: #280303;
$custom-light: #634748;
$custom-dark: #000000;

JSON

{
  "hex": "#280303",
  "rgb": {
    "r": 40,
    "g": 3,
    "b": 3
  },
  "hsl": {
    "h": 0,
    "s": 86.047,
    "l": 8.431
  },
  "oklch": {
    "l": 0.18128,
    "c": 0.06404,
    "h": 26.4
  },
  "luminance": 0.00523
}

Semantic roles & 50–950 ramp

primary

#280303

secondary

#1B6C6C

accent

#FCFC2C

background

#F6F4F4

surface

#EBE6E6

border

#C6C2C2

text

#060000

muted

#7A7777

Preview Lab

Preview with #280303

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

Preview Lab → · Contrast checker → · Palette generator →