#040310#040310

#040310 is a very dark, muted blue. Relative luminance 0.001; OKLCH L 11.2% C 0.034 H 284.8°. Best body text is #FFFFFF at 20.48:1 contrast (WCAG AA passes).

Color values

HEX	#040310
RGB	rgb(4, 3, 16)
HSL	hsl(245, 68%, 4%)
HSV	hsv(245, 81%, 6%)
CMYK	cmyk(75%, 81.3%, 0%, 93.7%)
CIE-LAB	lab(1.16, 2.22, -5.23)
CIE-LCH	lch(1.16, 5.68, 292.97°)
OKLab	oklab(11.16% 0.0088 -0.0332)
OKLCH	oklch(11.16% 0.034 284.8)
XYZ	xyz(0.1761, 0.1283, 0.5056)
Luminance	0.0013 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040310 #0F1003

analogous

#030810 #040310 #0A0310

triadic

#040310 #100403 #031004

tetradic

#040310 #100308 #0F1003 #03100A

square

#040310 #100308 #0F1003 #03100A

split-complementary

#040310 #100A03 #081003

monochromatic

#06051A #06051A #06051A #110D44 #1E1677

Accessibility & contrast

On white

20.48

#040310 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.03

#040310 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040310

20.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040310	#FFFFFF	#000000	##FFFFFF
##040310	1.00	20.48	1.03	20.48
#FFFFFF	20.48	1.00	21.00	1.00
#000000	1.03	21.00	1.00	21.00
##FFFFFF	20.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000511

Deuteranopia (green-blind)

#000410

Tritanopia (blue-blind)

#020507

Achromatopsia (no color)

#040404

Design tokens & code

CSS

--color: #040310;
/* rgb */ color: rgb(4, 3, 16);
/* oklch */ color: oklch(11.2% 0.034 284.8);

Tailwind

colors: {
  custom: {
    50: '#48484e',
    500: '#040310',
    950: '#000000',
  },
}

SCSS

$custom: #040310;
$custom-light: #48484e;
$custom-dark: #000000;

JSON

{
  "hex": "#040310",
  "rgb": {
    "r": 4,
    "g": 3,
    "b": 16
  },
  "hsl": {
    "h": 244.615,
    "s": 68.421,
    "l": 3.725
  },
  "oklch": {
    "l": 0.11156,
    "c": 0.03434,
    "h": 284.8
  },
  "luminance": 0.00128
}

Semantic roles & 50–950 ramp

primary

#040310

secondary

#4E521D

accent

#EB3DDE

background

#F4F4F4

surface

#E6E6E7

border

#C2C2C3

text

#000001

muted

#777777

Preview Lab

Preview with #040310

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

Preview Lab → · Contrast checker → · Palette generator →