#040C31#040C31

#040C31 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.7% C 0.075 H 266.9°. Best body text is #FFFFFF at 19.05:1 contrast (WCAG AA passes).

Color values

HEX	#040C31
RGB	rgb(4, 12, 49)
HSL	hsl(229, 85%, 10%)
HSV	hsv(229, 92%, 19%)
CMYK	cmyk(91.8%, 75.5%, 0%, 80.8%)
CIE-LAB	lab(4.61, 10.26, -24.63)
CIE-LCH	lch(4.61, 26.69, 292.62°)
OKLab	oklab(17.71% -0.0041 -0.0745)
OKLCH	oklch(17.71% 0.075 266.9)
XYZ	xyz(0.7357, 0.5104, 2.9649)
Luminance	0.0051 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.73

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C31 #312904

analogous

#042231 #040C31 #120431

triadic

#040C31 #31040C #0C3104

tetradic

#040C31 #310422 #312904 #043112

square

#040C31 #310422 #312904 #043112

split-complementary

#040C31 #311204 #223104

monochromatic

#02071C #02071C #040C31 #091A6A #0D28A2

Accessibility & contrast

On white

19.05

#040C31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040C31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C31

19.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C31	#FFFFFF	#000000	##FFFFFF
##040C31	1.00	19.05	1.10	19.05
#FFFFFF	19.05	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001232

Deuteranopia (green-blind)

#000E30

Tritanopia (blue-blind)

#00161C

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040c31;
/* rgb */ color: rgb(4, 12, 49);
/* oklch */ color: oklch(17.7% 0.075 266.9);

Tailwind

colors: {
  custom: {
    50: '#4b4c69',
    500: '#040c31',
    950: '#000000',
  },
}

SCSS

$custom: #040c31;
$custom-light: #4b4c69;
$custom-dark: #000000;

JSON

{
  "hex": "#040c31",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 49
  },
  "hsl": {
    "h": 229.333,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.17711,
    "c": 0.07457,
    "h": 266.9
  },
  "luminance": 0.00511
}

Semantic roles & 50–950 ramp

primary

#040C31

secondary

#73641D

accent

#D62DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040C31

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

Preview Lab → · Contrast checker → · Palette generator →