#04152B#04152B

#04152B is a very dark, muted cyan. Relative luminance 0.007; OKLCH L 19.5% C 0.051 H 254.7°. Best body text is #FFFFFF at 18.30:1 contrast (WCAG AA passes).

Color values

HEX	#04152B
RGB	rgb(4, 21, 43)
HSL	hsl(214, 83%, 9%)
HSV	hsv(214, 91%, 17%)
CMYK	cmyk(90.7%, 51.2%, 0%, 83.1%)
CIE-LAB	lab(6.65, 2.22, -16.92)
CIE-LCH	lch(6.65, 17.07, 277.46°)
OKLab	oklab(19.51% -0.0133 -0.0488)
OKLCH	oklch(19.51% 0.051 254.7)
XYZ	xyz(0.7541, 0.7365, 2.3874)
Luminance	0.0074 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04152B #2B1A04

analogous

#04292B #04152B #07042B

triadic

#04152B #2B0415 #152B04

tetradic

#04152B #2B0429 #2B1A04 #042B07

square

#04152B #2B0429 #2B1A04 #042B07

split-complementary

#04152B #2B0704 #292B04

monochromatic

#030E1C #030E1C #04152B #093063 #0E4C9B

Accessibility & contrast

On white

18.30

#04152B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#04152B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04152B

18.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04152B	#FFFFFF	#000000	##FFFFFF
##04152B	1.00	18.30	1.15	18.30
#FFFFFF	18.30	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A172C

Deuteranopia (green-blind)

#05132B

Tritanopia (blue-blind)

#001A1D

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #04152b;
/* rgb */ color: rgb(4, 21, 43);
/* oklch */ color: oklch(19.5% 0.051 254.7);

Tailwind

colors: {
  custom: {
    50: '#4a5264',
    500: '#04152b',
    950: '#000000',
  },
}

SCSS

$custom: #04152b;
$custom-light: #4a5264;
$custom-dark: #000000;

JSON

{
  "hex": "#04152b",
  "rgb": {
    "r": 4,
    "g": 21,
    "b": 43
  },
  "hsl": {
    "h": 213.846,
    "s": 82.979,
    "l": 9.216
  },
  "oklch": {
    "l": 0.19511,
    "c": 0.05057,
    "h": 254.7
  },
  "luminance": 0.00737
}

Semantic roles & 50–950 ramp

primary

#04152B

secondary

#6E4B1D

accent

#A12EF9

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010205

muted

#77787A

Preview Lab

Preview with #04152B

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

Preview Lab → · Contrast checker → · Palette generator →