#04103B#04103B

#04103B is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.8% C 0.085 H 265.4°. Best body text is #FFFFFF at 18.38:1 contrast (WCAG AA passes).

Color values

HEX	#04103B
RGB	rgb(4, 16, 59)
HSL	hsl(227, 87%, 12%)
HSV	hsv(227, 93%, 23%)
CMYK	cmyk(93.2%, 72.9%, 0%, 76.9%)
CIE-LAB	lab(6.43, 13.76, -29.01)
CIE-LCH	lch(6.43, 32.11, 295.38°)
OKLab	oklab(19.78% -0.0069 -0.0846)
OKLCH	oklch(19.78% 0.085 265.4)
XYZ	xyz(1.0245, 0.7120, 4.2203)
Luminance	0.0071 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04103B #3B2F04

analogous

#042C3B #04103B #13043B

triadic

#04103B #3B0410 #103B04

tetradic

#04103B #3B042C #3B2F04 #043B13

square

#04103B #3B042C #3B2F04 #043B13

split-complementary

#04103B #3B1304 #2C3B04

monochromatic

#02081D #02081D #04103B #082074 #0C2FAE

Accessibility & contrast

On white

18.38

#04103B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.14

#04103B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04103B

18.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04103B	#FFFFFF	#000000	##FFFFFF
##04103B	1.00	18.38	1.14	18.38
#FFFFFF	18.38	1.00	21.00	1.00
#000000	1.14	21.00	1.00	21.00
##FFFFFF	18.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00173C

Deuteranopia (green-blind)

#00123A

Tritanopia (blue-blind)

#001B23

Achromatopsia (no color)

#141414

Design tokens & code

CSS

--color: #04103b;
/* rgb */ color: rgb(4, 16, 59);
/* oklch */ color: oklch(19.8% 0.085 265.4);

Tailwind

colors: {
  custom: {
    50: '#4f4e71',
    500: '#04103b',
    950: '#000000',
  },
}

SCSS

$custom: #04103b;
$custom-light: #4f4e71;
$custom-dark: #000000;

JSON

{
  "hex": "#04103b",
  "rgb": {
    "r": 4,
    "g": 16,
    "b": 59
  },
  "hsl": {
    "h": 226.909,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.19781,
    "c": 0.08486,
    "h": 265.4
  },
  "luminance": 0.00712
}

Semantic roles & 50–950 ramp

primary

#04103B

secondary

#7D681E

accent

#CF2AFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020108

muted

#78777B

Preview Lab

Preview with #04103B

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

Preview Lab → · Contrast checker → · Palette generator →