#304B9F#304B9F

#304B9F is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.1% C 0.140 H 267.1°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#304B9F
RGB	rgb(48, 75, 159)
HSL	hsl(225, 54%, 41%)
HSV	hsv(225, 70%, 62%)
CMYK	cmyk(69.8%, 52.8%, 0%, 37.6%)
CIE-LAB	lab(34.32, 19.08, -48.72)
CIE-LCH	lch(34.32, 52.32, 291.38°)
OKLab	oklab(44.07% -0.0072 -0.14)
OKLCH	oklch(44.07% 0.14 267.1)
XYZ	xyz(9.9908, 8.1627, 33.8432)
Luminance	0.0816 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304B9F #9F8430

analogous

#30829F #304B9F #4C309F

triadic

#304B9F #9F304B #4B9F30

tetradic

#304B9F #9F3082 #9F8430 #309F4C

square

#304B9F #9F3082 #9F8430 #309F4C

split-complementary

#304B9F #9F4C30 #829F30

monochromatic

#141F41 #223570 #304B9F #4565C7 #748CD5

Accessibility & contrast

On white

7.98

#304B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#304B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304B9F

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304B9F	#FFFFFF	#000000	##FFFFFF
##304B9F	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1556A2

Deuteranopia (green-blind)

#004C9D

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #304b9f;
/* rgb */ color: rgb(48, 75, 159);
/* oklch */ color: oklch(44.1% 0.140 267.1);

Tailwind

colors: {
  custom: {
    50: '#767cbc',
    500: '#304b9f',
    950: '#000000',
  },
}

SCSS

$custom: #304b9f;
$custom-light: #767cbc;
$custom-dark: #000000;

JSON

{
  "hex": "#304b9f",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 159
  },
  "hsl": {
    "h": 225.405,
    "s": 53.623,
    "l": 40.588
  },
  "oklch": {
    "l": 0.44074,
    "c": 0.14018,
    "h": 267.1
  },
  "luminance": 0.08164
}

Semantic roles & 50–950 ramp

primary

#304B9F

secondary

#BDAA6E

accent

#B94BDD

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0912

muted

#7C7B81

Preview Lab

Preview with #304B9F

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

Preview Lab → · Contrast checker → · Palette generator →