#304B9D#304B9D

#304B9D is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.9% C 0.137 H 266.9°. Best body text is #FFFFFF at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#304B9D
RGB	rgb(48, 75, 157)
HSL	hsl(225, 53%, 40%)
HSV	hsv(225, 69%, 62%)
CMYK	cmyk(69.4%, 52.2%, 0%, 38.4%)
CIE-LAB	lab(34.18, 18.32, -47.74)
CIE-LCH	lch(34.18, 51.14, 291.00°)
OKLab	oklab(43.92% -0.0074 -0.1371)
OKLCH	oklch(43.92% 0.137 266.9)
XYZ	xyz(9.8187, 8.0939, 32.9366)
Luminance	0.0809 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304B9D #9D8230

analogous

#30819D #304B9D #4C309D

triadic

#304B9D #9D304B #4B9D30

tetradic

#304B9D #9D3081 #9D8230 #309D4C

square

#304B9D #9D3081 #9D8230 #309D4C

split-complementary

#304B9D #9D4C30 #819D30

monochromatic

#131E3F #22356E #304B9D #4464C6 #738BD4

Accessibility & contrast

On white

8.02

#304B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#304B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304B9D

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304B9D	#FFFFFF	#000000	##FFFFFF
##304B9D	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)

#1956A0

Deuteranopia (green-blind)

#004C9B

Tritanopia (blue-blind)

#005E6C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #304b9d;
/* rgb */ color: rgb(48, 75, 157);
/* oklch */ color: oklch(43.9% 0.137 266.9);

Tailwind

colors: {
  custom: {
    50: '#767cba',
    500: '#304b9d',
    950: '#000000',
  },
}

SCSS

$custom: #304b9d;
$custom-light: #767cba;
$custom-dark: #000000;

JSON

{
  "hex": "#304b9d",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 157
  },
  "hsl": {
    "h": 225.138,
    "s": 53.171,
    "l": 40.196
  },
  "oklch": {
    "l": 0.43921,
    "c": 0.13732,
    "h": 266.9
  },
  "luminance": 0.08095
}

Semantic roles & 50–950 ramp

primary

#304B9D

secondary

#BCA86D

accent

#B94BDD

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #304B9D

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

Preview Lab → · Contrast checker → · Palette generator →