#280503#280503

#280503 is a very dark, moderate red. Relative luminance 0.006; OKLCH L 18.5% C 0.060 H 29.5°. Best body text is #FFFFFF at 18.86:1 contrast (WCAG AA passes).

Color values

HEX	#280503
RGB	rgb(40, 5, 3)
HSL	hsl(3, 86%, 8%)
HSV	hsv(3, 93%, 16%)
CMYK	cmyk(0%, 87.5%, 92.5%, 84.3%)
CIE-LAB	lab(5.12, 16.53, 6.74)
CIE-LCH	lch(5.12, 17.85, 22.18°)
OKLab	oklab(18.53% 0.0526 0.0298)
OKLCH	oklch(18.53% 0.06 29.5)
XYZ	xyz(0.9459, 0.5664, 0.1456)
Luminance	0.0057 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#280503 #032628

analogous

#280313 #280503 #281703

triadic

#280503 #032805 #050328

tetradic

#280503 #132803 #032628 #170328

square

#280503 #132803 #032628 #170328

split-complementary

#280503 #032817 #031328

monochromatic

#1C0402 #1C0402 #280503 #610C07 #9A130C

Accessibility & contrast

On white

18.86

#280503 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#280503 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #280503

18.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##280503	#FFFFFF	#000000	##FFFFFF
##280503	1.00	18.86	1.11	18.86
#FFFFFF	18.86	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F0C03

Deuteranopia (green-blind)

#181402

Tritanopia (blue-blind)

#2D0005

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #280503;
/* rgb */ color: rgb(40, 5, 3);
/* oklch */ color: oklch(18.5% 0.060 29.5);

Tailwind

colors: {
  custom: {
    50: '#634848',
    500: '#280503',
    950: '#000000',
  },
}

SCSS

$custom: #280503;
$custom-light: #634848;
$custom-dark: #000000;

JSON

{
  "hex": "#280503",
  "rgb": {
    "r": 40,
    "g": 5,
    "b": 3
  },
  "hsl": {
    "h": 3.243,
    "s": 86.047,
    "l": 8.431
  },
  "oklch": {
    "l": 0.18532,
    "c": 0.06043,
    "h": 29.5
  },
  "luminance": 0.00566
}

Semantic roles & 50–950 ramp

primary

#280503

secondary

#1B686C

accent

#F1FC2C

background

#F6F4F4

surface

#EBE6E6

border

#C6C2C2

text

#060000

muted

#7A7777

Preview Lab

Preview with #280503

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

Preview Lab → · Contrast checker → · Palette generator →