#04173A#04173A

#04173A is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.4% C 0.073 H 260.4°. Best body text is #FFFFFF at 17.66:1 contrast (WCAG AA passes).

Color values

HEX	#04173A
RGB	rgb(4, 23, 58)
HSL	hsl(219, 87%, 12%)
HSV	hsv(219, 93%, 23%)
CMYK	cmyk(93.1%, 60.3%, 0%, 77.3%)
CIE-LAB	lab(8.52, 8.10, -24.90)
CIE-LCH	lch(8.52, 26.19, 288.02°)
OKLab	oklab(21.4% -0.0121 -0.0718)
OKLCH	oklch(21.4% 0.073 260.4)
XYZ	xyz(1.1199, 0.9440, 4.1253)
Luminance	0.0094 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04173A #3A2704

analogous

#04323A #04173A #0C043A

triadic

#04173A #3A0417 #173A04

tetradic

#04173A #3A0432 #3A2704 #043A0C

square

#04173A #3A0432 #3A2704 #043A0C

split-complementary

#04173A #3A0C04 #323A04

monochromatic

#020B1D #020B1D #04173A #082E73 #0C44AD

Accessibility & contrast

On white

17.66

#04173A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#04173A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04173A

17.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04173A	#FFFFFF	#000000	##FFFFFF
##04173A	1.00	17.66	1.19	17.66
#FFFFFF	17.66	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021B3B

Deuteranopia (green-blind)

#001639

Tritanopia (blue-blind)

#002025

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #04173a;
/* rgb */ color: rgb(4, 23, 58);
/* oklch */ color: oklch(21.4% 0.073 260.4);

Tailwind

colors: {
  custom: {
    50: '#4e5370',
    500: '#04173a',
    950: '#000000',
  },
}

SCSS

$custom: #04173a;
$custom-light: #4e5370;
$custom-dark: #000000;

JSON

{
  "hex": "#04173a",
  "rgb": {
    "r": 4,
    "g": 23,
    "b": 58
  },
  "hsl": {
    "h": 218.889,
    "s": 87.097,
    "l": 12.157
  },
  "oklch": {
    "l": 0.21404,
    "c": 0.07281,
    "h": 260.4
  },
  "luminance": 0.00944
}

Semantic roles & 50–950 ramp

primary

#04173A

secondary

#7C5B1E

accent

#B32BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #04173A

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

Preview Lab → · Contrast checker → · Palette generator →