#00042B#00042B

#00042B is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 14.5% C 0.081 H 263.8°. Best body text is #FFFFFF at 19.96:1 contrast (WCAG AA passes).

Color values

HEX	#00042B
RGB	rgb(0, 4, 43)
HSL	hsl(234, 100%, 8%)
HSV	hsv(234, 100%, 17%)
CMYK	cmyk(100%, 90.7%, 0%, 83.1%)
CIE-LAB	lab(2.36, 9.46, -23.71)
CIE-LCH	lch(2.36, 25.53, 291.76°)
OKLab	oklab(14.46% -0.0087 -0.0807)
OKLCH	oklch(14.46% 0.081 263.8)
XYZ	xyz(0.4793, 0.2612, 2.3102)
Luminance	0.0026 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#00042B #2B2700

analogous

#00192B #00042B #11002B

triadic

#00042B #2B0004 #042B00

tetradic

#00042B #2B0019 #2B2700 #002B11

square

#00042B #2B0019 #2B2700 #002B11

split-complementary

#00042B #2B1100 #192B00

monochromatic

#00031F #00031F #00042B #000A68 #000FA5

Accessibility & contrast

On white

19.96

#00042B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.05

#00042B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #00042B

19.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##00042B	#FFFFFF	#000000	##FFFFFF
##00042B	1.00	19.96	1.05	19.96
#FFFFFF	19.96	1.00	21.00	1.00
#000000	1.05	21.00	1.00	21.00
##FFFFFF	19.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000B2C

Deuteranopia (green-blind)

#00062A

Tritanopia (blue-blind)

#000F16

Achromatopsia (no color)

#090909

Design tokens & code

CSS

--color: #00042b;
/* rgb */ color: rgb(0, 4, 43);
/* oklch */ color: oklch(14.5% 0.081 263.8);

Tailwind

colors: {
  custom: {
    50: '#474864',
    500: '#00042b',
    950: '#000000',
  },
}

SCSS

$custom: #00042b;
$custom-light: #474864;
$custom-dark: #000000;

JSON

{
  "hex": "#00042b",
  "rgb": {
    "r": 0,
    "g": 4,
    "b": 43
  },
  "hsl": {
    "h": 234.419,
    "s": 100,
    "l": 8.431
  },
  "oklch": {
    "l": 0.1446,
    "c": 0.08121,
    "h": 263.8
  },
  "luminance": 0.00261
}

Semantic roles & 50–950 ramp

primary

#00042B

secondary

#736A14

accent

#EB29FF

background

#F4F4F6

surface

#E6E6EB

border

#C2C2C6

text

#000005

muted

#77777A

Preview Lab

Preview with #00042B

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

Preview Lab → · Contrast checker → · Palette generator →