#280103#280103

#280103 is a very dark, moderate red. Relative luminance 0.005; OKLCH L 17.7% C 0.068 H 23.5°. Best body text is #FFFFFF at 19.16:1 contrast (WCAG AA passes).

Color values

HEX	#280103
RGB	rgb(40, 1, 3)
HSL	hsl(357, 95%, 8%)
HSV	hsv(357, 98%, 16%)
CMYK	cmyk(0%, 97.5%, 92.5%, 84.3%)
CIE-LAB	lab(4.33, 18.24, 5.59)
CIE-LCH	lch(4.33, 19.08, 17.04°)
OKLab	oklab(17.7% 0.0625 0.0272)
OKLCH	oklch(17.7% 0.068 23.5)
XYZ	xyz(0.9025, 0.4795, 0.1312)
Luminance	0.0048 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#280103 #012826

analogous

#280116 #280103 #281201

triadic

#280103 #032801 #010328

tetradic

#280103 #162801 #012826 #120128

square

#280103 #162801 #012826 #120128

split-complementary

#280103 #012812 #011628

monochromatic

#1E0102 #1E0102 #280103 #640207 #9F040C

Accessibility & contrast

On white

19.16

#280103 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#280103 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #280103

19.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##280103	#FFFFFF	#000000	##FFFFFF
##280103	1.00	19.16	1.10	19.16
#FFFFFF	19.16	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B0903

Deuteranopia (green-blind)

#161202

Tritanopia (blue-blind)

#2D0002

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #280103;
/* rgb */ color: rgb(40, 1, 3);
/* oklch */ color: oklch(17.7% 0.068 23.5);

Tailwind

colors: {
  custom: {
    50: '#634648',
    500: '#280103',
    950: '#000000',
  },
}

SCSS

$custom: #280103;
$custom-light: #634648;
$custom-dark: #000000;

JSON

{
  "hex": "#280103",
  "rgb": {
    "r": 40,
    "g": 1,
    "b": 3
  },
  "hsl": {
    "h": 356.923,
    "s": 95.122,
    "l": 8.039
  },
  "oklch": {
    "l": 0.17703,
    "c": 0.06817,
    "h": 23.5
  },
  "luminance": 0.00479
}

Semantic roles & 50–950 ramp

primary

#280103

secondary

#166F6A

accent

#FFF429

background

#F6F3F4

surface

#EBE5E6

border

#C6C1C2

text

#060000

muted

#7A7677

Preview Lab

Preview with #280103

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

Preview Lab → · Contrast checker → · Palette generator →