#400503#400503

#400503 is a very dark, moderate red. Relative luminance 0.012; OKLCH L 24.0% C 0.089 H 29.1°. Best body text is #FFFFFF at 16.92:1 contrast (WCAG AA passes).

Color values

HEX	#400503
RGB	rgb(64, 5, 3)
HSL	hsl(2, 91%, 13%)
HSV	hsv(2, 95%, 25%)
CMYK	cmyk(0%, 92.2%, 95.3%, 74.9%)
CIE-LAB	lab(10.60, 27.53, 15.36)
CIE-LCH	lch(10.60, 31.52, 29.16°)
OKLab	oklab(23.99% 0.0779 0.0435)
OKLCH	oklch(23.99% 0.089 29.1)
XYZ	xyz(2.1853, 1.2055, 0.2037)
Luminance	0.0120 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400503 #033E40

analogous

#40031F #400503 #402303

triadic

#400503 #034005 #050340

tetradic

#400503 #1F4003 #033E40 #230340

square

#400503 #1F4003 #033E40 #230340

split-complementary

#400503 #034023 #031F40

monochromatic

#1D0201 #1D0201 #400503 #7A0A06 #B50E08

Accessibility & contrast

On white

16.92

#400503 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#400503 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400503

16.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400503	#FFFFFF	#000000	##FFFFFF
##400503	1.00	16.92	1.24	16.92
#FFFFFF	16.92	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#181402

Deuteranopia (green-blind)

#272101

Tritanopia (blue-blind)

#480005

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #400503;
/* rgb */ color: rgb(64, 5, 3);
/* oklch */ color: oklch(24.0% 0.089 29.1);

Tailwind

colors: {
  custom: {
    50: '#7a4c48',
    500: '#400503',
    950: '#000000',
  },
}

SCSS

$custom: #400503;
$custom-light: #7a4c48;
$custom-dark: #000000;

JSON

{
  "hex": "#400503",
  "rgb": {
    "r": 64,
    "g": 5,
    "b": 3
  },
  "hsl": {
    "h": 1.967,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23991,
    "c": 0.08923,
    "h": 29.1
  },
  "luminance": 0.01205
}

Semantic roles & 50–950 ramp

primary

#400503

secondary

#1D7F82

accent

#F8FF29

background

#F7F4F4

surface

#EEE7E6

border

#C9C3C2

text

#0A0100

muted

#7C7777

Preview Lab

Preview with #400503

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

Preview Lab → · Contrast checker → · Palette generator →