#304CB3#304CB3

#304CB3 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.9% C 0.167 H 267.7°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#304CB3
RGB	rgb(48, 76, 179)
HSL	hsl(227, 58%, 45%)
HSV	hsv(227, 73%, 70%)
CMYK	cmyk(73.2%, 57.5%, 0%, 29.8%)
CIE-LAB	lab(36.08, 25.90, -57.79)
CIE-LCH	lch(36.08, 63.33, 294.14°)
OKLab	oklab(45.87% -0.0067 -0.1667)
OKLCH	oklch(45.87% 0.167 267.7)
XYZ	xyz(11.9372, 9.0507, 43.7569)
Luminance	0.0905 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB3 #B39730

analogous

#308DB3 #304CB3 #5630B3

triadic

#304CB3 #B3304C #4CB330

tetradic

#304CB3 #B3308D #B39730 #30B356

square

#304CB3 #B3308D #B39730 #30B356

split-complementary

#304CB3 #B35630 #8DB330

monochromatic

#162352 #233883 #304CB3 #506BD0 #8094DD

Accessibility & contrast

On white

7.47

#304CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#304CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB3

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB3	#FFFFFF	#000000	##FFFFFF
##304CB3	1.00	7.47	2.81	7.47
#FFFFFF	7.47	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB6

Deuteranopia (green-blind)

#004FB1

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #304cb3;
/* rgb */ color: rgb(48, 76, 179);
/* oklch */ color: oklch(45.9% 0.167 267.7);

Tailwind

colors: {
  custom: {
    50: '#7a7dcb',
    500: '#304cb3',
    950: '#000000',
  },
}

SCSS

$custom: #304cb3;
$custom-light: #7a7dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb3",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 179
  },
  "hsl": {
    "h": 227.176,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.45872,
    "c": 0.1668,
    "h": 267.7
  },
  "luminance": 0.09052
}

Semantic roles & 50–950 ramp

primary

#304CB3

secondary

#C6B679

accent

#C047E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304CB3

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

Preview Lab → · Contrast checker → · Palette generator →