#304D9B#304D9B

#304D9B is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.2% C 0.132 H 265.9°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#304D9B
RGB	rgb(48, 77, 155)
HSL	hsl(224, 53%, 40%)
HSV	hsv(224, 69%, 61%)
CMYK	cmyk(69%, 50.3%, 0%, 39.2%)
CIE-LAB	lab(34.60, 16.24, -45.85)
CIE-LCH	lch(34.60, 48.64, 289.50°)
OKLab	oklab(44.2% -0.0095 -0.1315)
OKLCH	oklch(44.2% 0.132 265.9)
XYZ	xyz(9.7871, 8.3017, 32.0906)
Luminance	0.0830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304D9B #9B7E30

analogous

#30839B #304D9B #48309B

triadic

#304D9B #9B304D #4D9B30

tetradic

#304D9B #9B3083 #9B7E30 #309B48

square

#304D9B #9B3083 #9B7E30 #309B48

split-complementary

#304D9B #9B4830 #839B30

monochromatic

#131F3E #22366C #304D9B #4366C5 #728CD3

Accessibility & contrast

On white

7.89

#304D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#304D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304D9B

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304D9B	#FFFFFF	#000000	##FFFFFF
##304D9B	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21579E

Deuteranopia (green-blind)

#004D99

Tritanopia (blue-blind)

#005F6C

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #304d9b;
/* rgb */ color: rgb(48, 77, 155);
/* oklch */ color: oklch(44.2% 0.132 265.9);

Tailwind

colors: {
  custom: {
    50: '#757eb9',
    500: '#304d9b',
    950: '#000000',
  },
}

SCSS

$custom: #304d9b;
$custom-light: #757eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#304d9b",
  "rgb": {
    "r": 48,
    "g": 77,
    "b": 155
  },
  "hsl": {
    "h": 223.738,
    "s": 52.709,
    "l": 39.804
  },
  "oklch": {
    "l": 0.44201,
    "c": 0.13185,
    "h": 265.9
  },
  "luminance": 0.08303
}

Semantic roles & 50–950 ramp

primary

#304D9B

secondary

#BBA66C

accent

#B54CDC

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#090911

muted

#7B7B80

Preview Lab

Preview with #304D9B

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

Preview Lab → · Contrast checker → · Palette generator →