#04023B#04023B

#04023B is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.8% C 0.104 H 269.5°. Best body text is #FFFFFF at 19.50:1 contrast (WCAG AA passes).

Color values

HEX	#04023B
RGB	rgb(4, 2, 59)
HSL	hsl(242, 93%, 12%)
HSV	hsv(242, 97%, 23%)
CMYK	cmyk(93.2%, 96.6%, 0%, 76.9%)
CIE-LAB	lab(3.48, 20.27, -33.81)
CIE-LCH	lch(3.48, 39.42, 300.95°)
OKLab	oklab(16.83% -0.001 -0.1042)
OKLCH	oklch(16.83% 0.104 269.5)
XYZ	xyz(0.8609, 0.3849, 4.1657)
Luminance	0.0039 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04023B #393B02

analogous

#021D3B #04023B #21023B

triadic

#04023B #3B0402 #023B04

tetradic

#04023B #3B021D #393B02 #023B21

square

#04023B #3B021D #393B02 #023B21

split-complementary

#04023B #3B2102 #1D3B02

monochromatic

#02011E #02011E #04023B #080476 #0C06B1

Accessibility & contrast

On white

19.50

#04023B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#04023B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04023B

19.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04023B	#FFFFFF	#000000	##FFFFFF
##04023B	1.00	19.50	1.08	19.50
#FFFFFF	19.50	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F3D

Deuteranopia (green-blind)

#00093A

Tritanopia (blue-blind)

#00141F

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #04023b;
/* rgb */ color: rgb(4, 2, 59);
/* oklch */ color: oklch(16.8% 0.104 269.5);

Tailwind

colors: {
  custom: {
    50: '#4f4672',
    500: '#04023b',
    950: '#000000',
  },
}

SCSS

$custom: #04023b;
$custom-light: #4f4672;
$custom-dark: #000000;

JSON

{
  "hex": "#04023b",
  "rgb": {
    "r": 4,
    "g": 2,
    "b": 59
  },
  "hsl": {
    "h": 242.105,
    "s": 93.443,
    "l": 11.961
  },
  "oklch": {
    "l": 0.16833,
    "c": 0.10424,
    "h": 269.5
  },
  "luminance": 0.00385
}

Semantic roles & 50–950 ramp

primary

#04023B

secondary

#7B7E1A

accent

#FF29F7

background

#F4F3F6

surface

#E7E5EC

border

#C3C1C7

text

#020008

muted

#78777B

Preview Lab

Preview with #04023B

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

Preview Lab → · Contrast checker → · Palette generator →