#280403#280403

#280403 is a very dark, moderate red. Relative luminance 0.005; OKLCH L 18.3% C 0.062 H 28.0°. Best body text is #FFFFFF at 18.94:1 contrast (WCAG AA passes).

Color values

HEX	#280403
RGB	rgb(40, 4, 3)
HSL	hsl(2, 86%, 8%)
HSV	hsv(2, 93%, 16%)
CMYK	cmyk(0%, 90%, 92.5%, 84.3%)
CIE-LAB	lab(4.92, 16.96, 6.45)
CIE-LCH	lch(4.92, 18.15, 20.83°)
OKLab	oklab(18.33% 0.0549 0.0292)
OKLCH	oklch(18.33% 0.062 28)
XYZ	xyz(0.9350, 0.5447, 0.1420)
Luminance	0.0054 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#280403 #032728

analogous

#280314 #280403 #281603

triadic

#280403 #032804 #040328

tetradic

#280403 #142803 #032728 #160328

square

#280403 #142803 #032728 #160328

split-complementary

#280403 #032816 #031428

monochromatic

#1C0302 #1C0302 #280403 #610A07 #9A0F0C

Accessibility & contrast

On white

18.94

#280403 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#280403 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #280403

18.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##280403	#FFFFFF	#000000	##FFFFFF
##280403	1.00	18.94	1.11	18.94
#FFFFFF	18.94	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E0B03

Deuteranopia (green-blind)

#171402

Tritanopia (blue-blind)

#2D0004

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #280403;
/* rgb */ color: rgb(40, 4, 3);
/* oklch */ color: oklch(18.3% 0.062 28.0);

Tailwind

colors: {
  custom: {
    50: '#634848',
    500: '#280403',
    950: '#000000',
  },
}

SCSS

$custom: #280403;
$custom-light: #634848;
$custom-dark: #000000;

JSON

{
  "hex": "#280403",
  "rgb": {
    "r": 40,
    "g": 4,
    "b": 3
  },
  "hsl": {
    "h": 1.622,
    "s": 86.047,
    "l": 8.431
  },
  "oklch": {
    "l": 0.18332,
    "c": 0.06218,
    "h": 28
  },
  "luminance": 0.00545
}

Semantic roles & 50–950 ramp

primary

#280403

secondary

#1B6A6C

accent

#F7FC2C

background

#F6F4F4

surface

#EBE6E6

border

#C6C2C2

text

#060000

muted

#7A7777

Preview Lab

Preview with #280403

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

Preview Lab → · Contrast checker → · Palette generator →