#304C99#304C99

#304C99 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.8% C 0.130 H 266.1°. Best body text is #FFFFFF at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#304C99
RGB	rgb(48, 76, 153)
HSL	hsl(224, 52%, 39%)
HSV	hsv(224, 69%, 60%)
CMYK	cmyk(68.6%, 50.3%, 0%, 40%)
CIE-LAB	lab(34.18, 16.15, -45.32)
CIE-LCH	lch(34.18, 48.11, 289.62°)
OKLab	oklab(43.84% -0.0088 -0.13)
OKLCH	oklch(43.84% 0.13 266.1)
XYZ	xyz(9.5511, 8.0962, 31.1902)
Luminance	0.0810 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304C99 #997D30

analogous

#308199 #304C99 #493099

triadic

#304C99 #99304C #4C9930

tetradic

#304C99 #993081 #997D30 #309949

square

#304C99 #993081 #997D30 #309949

split-complementary

#304C99 #994930 #819930

monochromatic

#131E3C #21356A #304C99 #4265C4 #718BD2

Accessibility & contrast

On white

8.02

#304C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#304C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304C99

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304C99	#FFFFFF	#000000	##FFFFFF
##304C99	1.00	8.02	2.62	8.02
#FFFFFF	8.02	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21559C

Deuteranopia (green-blind)

#014C97

Tritanopia (blue-blind)

#005E6B

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #304c99;
/* rgb */ color: rgb(48, 76, 153);
/* oklch */ color: oklch(43.8% 0.130 266.1);

Tailwind

colors: {
  custom: {
    50: '#757db8',
    500: '#304c99',
    950: '#000000',
  },
}

SCSS

$custom: #304c99;
$custom-light: #757db8;
$custom-dark: #000000;

JSON

{
  "hex": "#304c99",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 153
  },
  "hsl": {
    "h": 224,
    "s": 52.239,
    "l": 39.412
  },
  "oklch": {
    "l": 0.43836,
    "c": 0.13027,
    "h": 266.1
  },
  "luminance": 0.08097
}

Semantic roles & 50–950 ramp

primary

#304C99

secondary

#BAA56B

accent

#B54CDC

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#090911

muted

#7B7B80

Preview Lab

Preview with #304C99

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

Preview Lab → · Contrast checker → · Palette generator →