#05023B#05023B

#05023B is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.9% C 0.104 H 270.7°. Best body text is #FFFFFF at 19.48:1 contrast (WCAG AA passes).

Color values

HEX	#05023B
RGB	rgb(5, 2, 59)
HSL	hsl(243, 93%, 12%)
HSV	hsv(243, 97%, 23%)
CMYK	cmyk(91.5%, 96.6%, 0%, 76.9%)
CIE-LAB	lab(3.53, 20.53, -33.71)
CIE-LCH	lch(3.53, 39.47, 301.33°)
OKLab	oklab(16.93% 0.0012 -0.1037)
OKLCH	oklch(16.93% 0.104 270.7)
XYZ	xyz(0.8734, 0.3913, 4.1663)
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

#05023B #383B02

analogous

#021C3B #05023B #22023B

triadic

#05023B #3B0502 #023B05

tetradic

#05023B #3B021C #383B02 #023B22

square

#05023B #3B021C #383B02 #023B22

split-complementary

#05023B #3B2202 #1C3B02

monochromatic

#03011E #03011E #05023B #0A0476 #0F06B1

Accessibility & contrast

On white

19.48

#05023B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#05023B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #05023B

19.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##05023B	#FFFFFF	#000000	##FFFFFF
##05023B	1.00	19.48	1.08	19.48
#FFFFFF	19.48	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00103D

Deuteranopia (green-blind)

#000A3A

Tritanopia (blue-blind)

#00141F

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #05023b;
/* rgb */ color: rgb(5, 2, 59);
/* oklch */ color: oklch(16.9% 0.104 270.7);

Tailwind

colors: {
  custom: {
    50: '#4f4672',
    500: '#05023b',
    950: '#000000',
  },
}

SCSS

$custom: #05023b;
$custom-light: #4f4672;
$custom-dark: #000000;

JSON

{
  "hex": "#05023b",
  "rgb": {
    "r": 5,
    "g": 2,
    "b": 59
  },
  "hsl": {
    "h": 243.158,
    "s": 93.443,
    "l": 11.961
  },
  "oklch": {
    "l": 0.16929,
    "c": 0.10374,
    "h": 270.7
  },
  "luminance": 0.00391
}

Semantic roles & 50–950 ramp

primary

#05023B

secondary

#797E1A

accent

#FF29F4

background

#F4F3F6

surface

#E7E5EC

border

#C3C1C7

text

#020008

muted

#78777B

Preview Lab

Preview with #05023B

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

Preview Lab → · Contrast checker → · Palette generator →