Deep Blue#040273

#040273 is a dark, vivid blue. Relative luminance 0.013; OKLCH L 25.5% C 0.171 H 265.6°. Best body text is #FFFFFF at 16.65:1 contrast (WCAG AA passes).

Deep Blue — editorial page

Color values

HEX	#040273
RGB	rgb(4, 2, 115)
HSL	hsl(241, 97%, 23%)
HSV	hsv(241, 98%, 45%)
CMYK	cmyk(96.5%, 98.3%, 0%, 54.9%)
CIE-LAB	lab(11.32, 43.10, -59.09)
CIE-LCH	lch(11.32, 73.14, 306.10°)
OKLab	oklab(25.49% -0.0132 -0.1708)
OKLCH	oklch(25.49% 0.171 265.6)
XYZ	xyz(3.1652, 1.3066, 16.3017)
Luminance	0.0131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040273 #717302

analogous

#023873 #040273 #3C0273

triadic

#040273 #730402 #027304

tetradic

#040273 #730238 #717302 #02733C

square

#040273 #730238 #717302 #02733C

split-complementary

#040273 #733C02 #387302

monochromatic

#01011E #020137 #040273 #0603AF #0804EB

Accessibility & contrast

On white

16.65

#040273 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#040273 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040273

16.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040273	#FFFFFF	#000000	##FFFFFF
##040273	1.00	16.65	1.26	16.65
#FFFFFF	16.65	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002476

Deuteranopia (green-blind)

#001871

Tritanopia (blue-blind)

#002D41

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #040273;
/* rgb */ color: rgb(4, 2, 115);
/* oklch */ color: oklch(25.5% 0.171 265.6);

Tailwind

colors: {
  custom: {
    50: '#644a9d',
    500: '#040273',
    950: '#000000',
  },
}

SCSS

$custom: #040273;
$custom-light: #644a9d;
$custom-dark: #000000;

JSON

{
  "hex": "#040273",
  "rgb": {
    "r": 4,
    "g": 2,
    "b": 115
  },
  "hsl": {
    "h": 241.062,
    "s": 96.581,
    "l": 22.941
  },
  "oklch": {
    "l": 0.25493,
    "c": 0.17126,
    "h": 265.6
  },
  "luminance": 0.01307
}

Semantic roles & 50–950 ramp

primary

#040273

secondary

#ACAF22

accent

#FF29FB

background

#F6F4F9

surface

#EBE7F2

border

#C6C3CC

text

#07010E

muted

#7A777E

Preview Lab

Preview with #040273

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

Preview Lab → · Contrast checker → · Palette generator →