#400403#400403

#400403 is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.9% C 0.090 H 28.5°. Best body text is #FFFFFF at 16.98:1 contrast (WCAG AA passes).

Color values

HEX	#400403
RGB	rgb(64, 4, 3)
HSL	hsl(1, 91%, 13%)
HSV	hsv(1, 95%, 25%)
CMYK	cmyk(0%, 93.8%, 95.3%, 74.9%)
CIE-LAB	lab(10.44, 27.99, 15.13)
CIE-LCH	lch(10.44, 31.82, 28.40°)
OKLab	oklab(23.87% 0.0794 0.0431)
OKLCH	oklch(23.87% 0.09 28.5)
XYZ	xyz(2.1745, 1.1838, 0.2001)
Luminance	0.0118 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400403 #033F40

analogous

#400320 #400403 #402203

triadic

#400403 #034004 #040340

tetradic

#400403 #204003 #033F40 #220340

square

#400403 #204003 #033F40 #220340

split-complementary

#400403 #034022 #032040

monochromatic

#1D0201 #1D0201 #400403 #7A0806 #B50B08

Accessibility & contrast

On white

16.98

#400403 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#400403 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400403

16.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400403	#FFFFFF	#000000	##FFFFFF
##400403	1.00	16.98	1.24	16.98
#FFFFFF	16.98	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#181402

Deuteranopia (green-blind)

#262101

Tritanopia (blue-blind)

#480004

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #400403;
/* rgb */ color: rgb(64, 4, 3);
/* oklch */ color: oklch(23.9% 0.090 28.5);

Tailwind

colors: {
  custom: {
    50: '#7b4b48',
    500: '#400403',
    950: '#000000',
  },
}

SCSS

$custom: #400403;
$custom-light: #7b4b48;
$custom-dark: #000000;

JSON

{
  "hex": "#400403",
  "rgb": {
    "r": 64,
    "g": 4,
    "b": 3
  },
  "hsl": {
    "h": 0.984,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23872,
    "c": 0.09034,
    "h": 28.5
  },
  "luminance": 0.01183
}

Semantic roles & 50–950 ramp

primary

#400403

secondary

#1D8082

accent

#FBFF29

background

#F7F4F4

surface

#EEE7E6

border

#C9C3C2

text

#0A0100

muted

#7C7777

Preview Lab

Preview with #400403

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

Preview Lab → · Contrast checker → · Palette generator →