#304FB3#304FB3

#304FB3 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.5% C 0.163 H 266.8°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#304FB3
RGB	rgb(48, 79, 179)
HSL	hsl(226, 58%, 45%)
HSV	hsv(226, 73%, 70%)
CMYK	cmyk(73.2%, 55.9%, 0%, 29.8%)
CIE-LAB	lab(36.88, 23.93, -56.50)
CIE-LCH	lch(36.88, 61.36, 292.96°)
OKLab	oklab(46.47% -0.0091 -0.1628)
OKLCH	oklch(46.47% 0.163 266.8)
XYZ	xyz(12.1488, 9.4737, 43.8274)
Luminance	0.0948 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304FB3 #B39430

analogous

#3090B3 #304FB3 #5330B3

triadic

#304FB3 #B3304F #4FB330

tetradic

#304FB3 #B33090 #B39430 #30B353

square

#304FB3 #B33090 #B39430 #30B353

split-complementary

#304FB3 #B35330 #90B330

monochromatic

#162452 #233A83 #304FB3 #506ED0 #8096DD

Accessibility & contrast

On white

7.25

#304FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#304FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304FB3

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304FB3	#FFFFFF	#000000	##FFFFFF
##304FB3	1.00	7.25	2.89	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB6

Deuteranopia (green-blind)

#0051B1

Tritanopia (blue-blind)

#006779

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304fb3;
/* rgb */ color: rgb(48, 79, 179);
/* oklch */ color: oklch(46.5% 0.163 266.8);

Tailwind

colors: {
  custom: {
    50: '#7a7fca',
    500: '#304fb3',
    950: '#000000',
  },
}

SCSS

$custom: #304fb3;
$custom-light: #7a7fca;
$custom-dark: #000000;

JSON

{
  "hex": "#304fb3",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 179
  },
  "hsl": {
    "h": 225.802,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.46472,
    "c": 0.16305,
    "h": 266.8
  },
  "luminance": 0.09475
}

Semantic roles & 50–950 ramp

primary

#304FB3

secondary

#C6B479

accent

#BC47E1

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #304FB3

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

Preview Lab → · Contrast checker → · Palette generator →