#304D8A#304D8A

#304D8A is a dark, moderate blue. Relative luminance 0.078; OKLCH L 43.0% C 0.107 H 263.4°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#304D8A
RGB	rgb(48, 77, 138)
HSL	hsl(221, 48%, 36%)
HSV	hsv(221, 65%, 54%)
CMYK	cmyk(65.2%, 44.2%, 0%, 45.9%)
CIE-LAB	lab(33.50, 9.87, -37.28)
CIE-LCH	lch(33.50, 38.56, 284.83°)
OKLab	oklab(43% -0.0123 -0.1063)
OKLCH	oklch(43% 0.107 263.4)
XYZ	xyz(8.4586, 7.7703, 25.0939)
Luminance	0.0777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304D8A #8A6D30

analogous

#307A8A #304D8A #40308A

triadic

#304D8A #8A304D #4D8A30

tetradic

#304D8A #8A307A #8A6D30 #308A40

square

#304D8A #8A307A #8A6D30 #308A40

split-complementary

#304D8A #8A4030 #7A8A30

monochromatic

#101A2F #20345D #304D8A #4066B7 #6989CB

Accessibility & contrast

On white

8.22

#304D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#304D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304D8A

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304D8A	#FFFFFF	#000000	##FFFFFF
##304D8A	1.00	8.22	2.55	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#31538C

Deuteranopia (green-blind)

#234B89

Tritanopia (blue-blind)

#005B64

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #304d8a;
/* rgb */ color: rgb(48, 77, 138);
/* oklch */ color: oklch(43.0% 0.107 263.4);

Tailwind

colors: {
  custom: {
    50: '#727eac',
    500: '#304d8a',
    950: '#000000',
  },
}

SCSS

$custom: #304d8a;
$custom-light: #727eac;
$custom-dark: #000000;

JSON

{
  "hex": "#304d8a",
  "rgb": {
    "r": 48,
    "g": 77,
    "b": 138
  },
  "hsl": {
    "h": 220.667,
    "s": 48.387,
    "l": 36.471
  },
  "oklch": {
    "l": 0.43,
    "c": 0.10701,
    "h": 263.4
  },
  "luminance": 0.07771
}

Semantic roles & 50–950 ramp

primary

#304D8A

secondary

#B29964

accent

#AC50D8

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #304D8A

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

Preview Lab → · Contrast checker → · Palette generator →