#04102A#04102A

#04102A is a very dark, muted blue. Relative luminance 0.006; OKLCH L 18.0% C 0.056 H 261.7°. Best body text is #FFFFFF at 18.87:1 contrast (WCAG AA passes).

Color values

HEX	#04102A
RGB	rgb(4, 16, 42)
HSL	hsl(221, 83%, 9%)
HSV	hsv(221, 90%, 16%)
CMYK	cmyk(90.5%, 61.9%, 0%, 83.5%)
CIE-LAB	lab(5.09, 4.81, -18.64)
CIE-LCH	lch(5.09, 19.25, 284.48°)
OKLab	oklab(18% -0.0081 -0.0558)
OKLCH	oklch(18% 0.056 261.7)
XYZ	xyz(0.6531, 0.5635, 2.2644)
Luminance	0.0056 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.17

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04102A #2A1E04

analogous

#04232A #04102A #0B042A

triadic

#04102A #2A0410 #102A04

tetradic

#04102A #2A0423 #2A1E04 #042A0B

square

#04102A #2A0423 #2A1E04 #042A0B

split-complementary

#04102A #2A0B04 #232A04

monochromatic

#030B1C #030B1C #04102A #092562 #0F3B9A

Accessibility & contrast

On white

18.87

#04102A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#04102A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04102A

18.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04102A	#FFFFFF	#000000	##FFFFFF
##04102A	1.00	18.87	1.11	18.87
#FFFFFF	18.87	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03132B

Deuteranopia (green-blind)

#000F29

Tritanopia (blue-blind)

#00161A

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #04102a;
/* rgb */ color: rgb(4, 16, 42);
/* oklch */ color: oklch(18.0% 0.056 261.7);

Tailwind

colors: {
  custom: {
    50: '#494e63',
    500: '#04102a',
    950: '#000000',
  },
}

SCSS

$custom: #04102a;
$custom-light: #494e63;
$custom-dark: #000000;

JSON

{
  "hex": "#04102a",
  "rgb": {
    "r": 4,
    "g": 16,
    "b": 42
  },
  "hsl": {
    "h": 221.053,
    "s": 82.609,
    "l": 9.02
  },
  "oklch": {
    "l": 0.17999,
    "c": 0.05639,
    "h": 261.7
  },
  "luminance": 0.00564
}

Semantic roles & 50–950 ramp

primary

#04102A

secondary

#6D541D

accent

#B92FF9

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #04102A

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

Preview Lab → · Contrast checker → · Palette generator →