#280309#280309

#280309 is a very dark, moderate red. Relative luminance 0.005; OKLCH L 18.3% C 0.063 H 14.7°. Best body text is #FFFFFF at 18.97:1 contrast (WCAG AA passes).

Color values

HEX	#280309
RGB	rgb(40, 3, 9)
HSL	hsl(350, 86%, 8%)
HSV	hsv(350, 93%, 16%)
CMYK	cmyk(0%, 92.5%, 77.5%, 84.3%)
CIE-LAB	lab(4.84, 18.13, 3.89)
CIE-LCH	lch(4.84, 18.54, 12.12°)
OKLab	oklab(18.31% 0.0614 0.0161)
OKLCH	oklch(18.31% 0.063 14.7)
XYZ	xyz(0.9570, 0.5361, 0.3115)
Luminance	0.0054 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#280309 #032822

analogous

#28031B #280309 #280F03

triadic

#280309 #092803 #030928

tetradic

#280309 #1B2803 #032822 #0F0328

square

#280309 #1B2803 #032822 #0F0328

split-complementary

#280309 #03280F #031B28

monochromatic

#1C0206 #1C0206 #280309 #610716 #9A0C23

Accessibility & contrast

On white

18.97

#280309 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#280309 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #280309

18.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##280309	#FFFFFF	#000000	##FFFFFF
##280309	1.00	18.97	1.11	18.97
#FFFFFF	18.97	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C0B09

Deuteranopia (green-blind)

#161308

Tritanopia (blue-blind)

#2D0005

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #280309;
/* rgb */ color: rgb(40, 3, 9);
/* oklch */ color: oklch(18.3% 0.063 14.7);

Tailwind

colors: {
  custom: {
    50: '#64474b',
    500: '#280309',
    950: '#000000',
  },
}

SCSS

$custom: #280309;
$custom-light: #64474b;
$custom-dark: #000000;

JSON

{
  "hex": "#280309",
  "rgb": {
    "r": 40,
    "g": 3,
    "b": 9
  },
  "hsl": {
    "h": 350.27,
    "s": 86.047,
    "l": 8.431
  },
  "oklch": {
    "l": 0.18305,
    "c": 0.06347,
    "h": 14.7
  },
  "luminance": 0.00536
}

Semantic roles & 50–950 ramp

primary

#280309

secondary

#1B6C5F

accent

#FCDA2C

background

#F6F4F4

surface

#EBE6E7

border

#C6C2C3

text

#060001

muted

#7A7777

Preview Lab

Preview with #280309

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

Preview Lab → · Contrast checker → · Palette generator →