#40030A#40030A

#40030A is a very dark, moderate red. Relative luminance 0.012; OKLCH L 23.9% C 0.091 H 21.4°. Best body text is #FFFFFF at 17.00:1 contrast (WCAG AA passes).

Color values

HEX	#40030A
RGB	rgb(64, 3, 10)
HSL	hsl(353, 91%, 13%)
HSV	hsv(353, 95%, 25%)
CMYK	cmyk(0%, 95.3%, 84.4%, 74.9%)
CIE-LAB	lab(10.39, 28.79, 12.21)
CIE-LCH	lch(10.39, 31.27, 22.99°)
OKLab	oklab(23.87% 0.0843 0.0331)
OKLCH	oklch(23.87% 0.091 21.4)
XYZ	xyz(2.2020, 1.1774, 0.3984)
Luminance	0.0118 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40030A #034039

analogous

#400328 #40030A #401A03

triadic

#40030A #0A4003 #030A40

tetradic

#40030A #284003 #034039 #1A0340

square

#40030A #284003 #034039 #1A0340

split-complementary

#40030A #03401A #032840

monochromatic

#1D0105 #1D0105 #40030A #7A0613 #B5081C

Accessibility & contrast

On white

17.00

#40030A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#40030A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40030A

17.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40030A	#FFFFFF	#000000	##FFFFFF
##40030A	1.00	17.00	1.24	17.00
#FFFFFF	17.00	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	17.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16140A

Deuteranopia (green-blind)

#252108

Tritanopia (blue-blind)

#470006

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #40030a;
/* rgb */ color: rgb(64, 3, 10);
/* oklch */ color: oklch(23.9% 0.091 21.4);

Tailwind

colors: {
  custom: {
    50: '#7a4b4b',
    500: '#40030a',
    950: '#000000',
  },
}

SCSS

$custom: #40030a;
$custom-light: #7a4b4b;
$custom-dark: #000000;

JSON

{
  "hex": "#40030a",
  "rgb": {
    "r": 64,
    "g": 3,
    "b": 10
  },
  "hsl": {
    "h": 353.115,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.23873,
    "c": 0.09051,
    "h": 21.4
  },
  "luminance": 0.01177
}

Semantic roles & 50–950 ramp

primary

#40030A

secondary

#1D8276

accent

#FFE629

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #40030A

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

Preview Lab → · Contrast checker → · Palette generator →