#304B79#304B79

#304B79 is a dark, moderate blue. Relative luminance 0.070; OKLCH L 41.4% C 0.084 H 260.5°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#304B79
RGB	rgb(48, 75, 121)
HSL	hsl(218, 43%, 33%)
HSV	hsv(218, 60%, 47%)
CMYK	cmyk(60.3%, 38%, 0%, 52.5%)
CIE-LAB	lab(31.90, 4.95, -29.31)
CIE-LCH	lch(31.90, 29.72, 279.59°)
OKLab	oklab(41.44% -0.0139 -0.083)
OKLCH	oklch(41.44% 0.084 260.5)
XYZ	xyz(7.1850, 7.0404, 19.0658)
Luminance	0.0704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304B79 #795E30

analogous

#306F79 #304B79 #393079

triadic

#304B79 #79304B #4B7930

tetradic

#304B79 #79306F #795E30 #307939

square

#304B79 #79306F #795E30 #307939

split-complementary

#304B79 #793930 #6F7930

monochromatic

#0D1521 #1F304D #304B79 #4166A5 #6285C1

Accessibility & contrast

On white

8.72

#304B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#304B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304B79

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304B79	#FFFFFF	#000000	##FFFFFF
##304B79	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#384F7B

Deuteranopia (green-blind)

#2E4878

Tritanopia (blue-blind)

#00555C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #304b79;
/* rgb */ color: rgb(48, 75, 121);
/* oklch */ color: oklch(41.4% 0.084 260.5);

Tailwind

colors: {
  custom: {
    50: '#6f7da0',
    500: '#304b79',
    950: '#000000',
  },
}

SCSS

$custom: #304b79;
$custom-light: #6f7da0;
$custom-dark: #000000;

JSON

{
  "hex": "#304b79",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 121
  },
  "hsl": {
    "h": 217.808,
    "s": 43.195,
    "l": 33.137
  },
  "oklch": {
    "l": 0.41437,
    "c": 0.08414,
    "h": 260.5
  },
  "luminance": 0.07041
}

Semantic roles & 50–950 ramp

primary

#304B79

secondary

#A88C5D

accent

#A455D3

background

#F6F7F9

surface

#ECEEF2

border

#C7C9CC

text

#08090E

muted

#7B7B7E

Preview Lab

Preview with #304B79

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

Preview Lab → · Contrast checker → · Palette generator →