#040C30#040C30

#040C30 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.6% C 0.073 H 266.8°. Best body text is #FFFFFF at 19.08:1 contrast (WCAG AA passes).

Color values

HEX	#040C30
RGB	rgb(4, 12, 48)
HSL	hsl(229, 85%, 10%)
HSV	hsv(229, 92%, 19%)
CMYK	cmyk(91.7%, 75%, 0%, 81.2%)
CIE-LAB	lab(4.54, 9.74, -24.01)
CIE-LCH	lch(4.54, 25.91, 292.07°)
OKLab	oklab(17.6% -0.0041 -0.0728)
OKLCH	oklch(17.6% 0.073 266.8)
XYZ	xyz(0.7149, 0.5021, 2.8550)
Luminance	0.0050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.02

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C30 #302804

analogous

#042230 #040C30 #120430

triadic

#040C30 #30040C #0C3004

tetradic

#040C30 #300422 #302804 #043012

square

#040C30 #300422 #302804 #043012

split-complementary

#040C30 #301204 #223004

monochromatic

#02071C #02071C #040C30 #091A68 #0D28A1

Accessibility & contrast

On white

19.08

#040C30 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040C30 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C30

19.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C30	#FFFFFF	#000000	##FFFFFF
##040C30	1.00	19.08	1.10	19.08
#FFFFFF	19.08	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001231

Deuteranopia (green-blind)

#000E2F

Tritanopia (blue-blind)

#00151C

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040c30;
/* rgb */ color: rgb(4, 12, 48);
/* oklch */ color: oklch(17.6% 0.073 266.8);

Tailwind

colors: {
  custom: {
    50: '#4b4c68',
    500: '#040c30',
    950: '#000000',
  },
}

SCSS

$custom: #040c30;
$custom-light: #4b4c68;
$custom-dark: #000000;

JSON

{
  "hex": "#040c30",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 48
  },
  "hsl": {
    "h": 229.091,
    "s": 84.615,
    "l": 10.196
  },
  "oklch": {
    "l": 0.17597,
    "c": 0.07292,
    "h": 266.8
  },
  "luminance": 0.00502
}

Semantic roles & 50–950 ramp

primary

#040C30

secondary

#72631D

accent

#D52DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040C30

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

Preview Lab → · Contrast checker → · Palette generator →