#04052B#04052B

#04052B is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 15.3% C 0.076 H 271.3°. Best body text is #FFFFFF at 19.78:1 contrast (WCAG AA passes).

Color values

HEX	#04052B
RGB	rgb(4, 5, 43)
HSL	hsl(238, 83%, 9%)
HSV	hsv(238, 91%, 17%)
CMYK	cmyk(90.7%, 88.4%, 0%, 83.1%)
CIE-LAB	lab(2.79, 10.11, -23.02)
CIE-LCH	lch(2.79, 25.14, 293.71°)
OKLab	oklab(15.25% 0.0017 -0.0761)
OKLCH	oklch(15.25% 0.076 271.3)
XYZ	xyz(0.5402, 0.3087, 2.3161)
Luminance	0.0031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04052B #2B2A04

analogous

#04192B #04052B #17042B

triadic

#04052B #2B0405 #052B04

tetradic

#04052B #2B0419 #2B2A04 #042B17

square

#04052B #2B0419 #2B2A04 #042B17

split-complementary

#04052B #2B1704 #192B04

monochromatic

#03031C #03031C #04052B #090C63 #0E129B

Accessibility & contrast

On white

19.78

#04052B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#04052B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04052B

19.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04052B	#FFFFFF	#000000	##FFFFFF
##04052B	1.00	19.78	1.06	19.78
#FFFFFF	19.78	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000C2C

Deuteranopia (green-blind)

#00082A

Tritanopia (blue-blind)

#000F17

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #04052b;
/* rgb */ color: rgb(4, 5, 43);
/* oklch */ color: oklch(15.3% 0.076 271.3);

Tailwind

colors: {
  custom: {
    50: '#494964',
    500: '#04052b',
    950: '#000000',
  },
}

SCSS

$custom: #04052b;
$custom-light: #494964;
$custom-dark: #000000;

JSON

{
  "hex": "#04052b",
  "rgb": {
    "r": 4,
    "g": 5,
    "b": 43
  },
  "hsl": {
    "h": 238.462,
    "s": 82.979,
    "l": 9.216
  },
  "oklch": {
    "l": 0.15252,
    "c": 0.07615,
    "h": 271.3
  },
  "luminance": 0.00309
}

Semantic roles & 50–950 ramp

primary

#04052B

secondary

#6E6C1D

accent

#F42EF9

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010005

muted

#77777A

Preview Lab

Preview with #04052B

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

Preview Lab → · Contrast checker → · Palette generator →