#280307#280307

#280307 is a very dark, moderate red. Relative luminance 0.005; OKLCH L 18.2% C 0.063 H 18.3°. Best body text is #FFFFFF at 18.98:1 contrast (WCAG AA passes).

Color values

HEX	#280307
RGB	rgb(40, 3, 7)
HSL	hsl(354, 86%, 8%)
HSV	hsv(354, 93%, 16%)
CMYK	cmyk(0%, 92.5%, 82.5%, 84.3%)
CIE-LAB	lab(4.80, 17.89, 4.65)
CIE-LCH	lch(4.80, 18.48, 14.57°)
OKLab	oklab(18.25% 0.0602 0.0199)
OKLCH	oklch(18.25% 0.063 18.3)
XYZ	xyz(0.9461, 0.5317, 0.2538)
Luminance	0.0053 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#280307 #032824

analogous

#280319 #280307 #281103

triadic

#280307 #072803 #030728

tetradic

#280307 #192803 #032824 #110328

square

#280307 #192803 #032824 #110328

split-complementary

#280307 #032811 #031928

monochromatic

#1C0205 #1C0205 #280307 #610711 #9A0C1B

Accessibility & contrast

On white

18.98

#280307 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#280307 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #280307

18.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##280307	#FFFFFF	#000000	##FFFFFF
##280307	1.00	18.98	1.11	18.98
#FFFFFF	18.98	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C0B07

Deuteranopia (green-blind)

#161306

Tritanopia (blue-blind)

#2D0005

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #280307;
/* rgb */ color: rgb(40, 3, 7);
/* oklch */ color: oklch(18.2% 0.063 18.3);

Tailwind

colors: {
  custom: {
    50: '#63474a',
    500: '#280307',
    950: '#000000',
  },
}

SCSS

$custom: #280307;
$custom-light: #63474a;
$custom-dark: #000000;

JSON

{
  "hex": "#280307",
  "rgb": {
    "r": 40,
    "g": 3,
    "b": 7
  },
  "hsl": {
    "h": 353.514,
    "s": 86.047,
    "l": 8.431
  },
  "oklch": {
    "l": 0.18247,
    "c": 0.06343,
    "h": 18.3
  },
  "luminance": 0.00532
}

Semantic roles & 50–950 ramp

primary

#280307

secondary

#1B6C63

accent

#FCE62C

background

#F6F4F4

surface

#EBE6E7

border

#C6C2C3

text

#060001

muted

#7A7777

Preview Lab

Preview with #280307

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

Preview Lab → · Contrast checker → · Palette generator →