#304578#304578

#304578 is a dark, moderate blue. Relative luminance 0.062; OKLCH L 40.0% C 0.090 H 265.6°. Best body text is #FFFFFF at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#304578
RGB	rgb(48, 69, 120)
HSL	hsl(223, 43%, 33%)
HSV	hsv(223, 60%, 47%)
CMYK	cmyk(60%, 42.5%, 0%, 52.9%)
CIE-LAB	lab(30.01, 8.60, -31.67)
CIE-LCH	lch(30.01, 32.82, 285.18°)
OKLab	oklab(39.96% -0.0069 -0.09)
OKLCH	oklch(39.96% 0.09 265.6)
XYZ	xyz(6.7361, 6.2401, 18.6152)
Luminance	0.0624 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304578 #786330

analogous

#306978 #304578 #3F3078

triadic

#304578 #783045 #457830

tetradic

#304578 #783069 #786330 #30783F

square

#304578 #783069 #786330 #30783F

split-complementary

#304578 #783F30 #697830

monochromatic

#0D1321 #1F2C4C #304578 #415EA4 #627EC0

Accessibility & contrast

On white

9.34

#304578 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#304578 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304578

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304578	#FFFFFF	#000000	##FFFFFF
##304578	1.00	9.34	2.25	9.34
#FFFFFF	9.34	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4A7A

Deuteranopia (green-blind)

#264477

Tritanopia (blue-blind)

#005058

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #304578;
/* rgb */ color: rgb(48, 69, 120);
/* oklch */ color: oklch(40.0% 0.090 265.6);

Tailwind

colors: {
  custom: {
    50: '#6f789f',
    500: '#304578',
    950: '#000000',
  },
}

SCSS

$custom: #304578;
$custom-light: #6f789f;
$custom-dark: #000000;

JSON

{
  "hex": "#304578",
  "rgb": {
    "r": 48,
    "g": 69,
    "b": 120
  },
  "hsl": {
    "h": 222.5,
    "s": 42.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.39957,
    "c": 0.09024,
    "h": 265.6
  },
  "luminance": 0.06241
}

Semantic roles & 50–950 ramp

primary

#304578

secondary

#A7925C

accent

#AE55D3

background

#F6F7F9

surface

#ECEDF2

border

#C7C8CC

text

#08080E

muted

#7B7B7E

Preview Lab

Preview with #304578

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

Preview Lab → · Contrast checker → · Palette generator →