#304EB7#304EB7

#304EB7 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.6% C 0.170 H 267.3°. Best body text is #FFFFFF at 7.24:1 contrast (WCAG AA passes).

Color values

HEX	#304EB7
RGB	rgb(48, 78, 183)
HSL	hsl(227, 58%, 45%)
HSV	hsv(227, 74%, 72%)
CMYK	cmyk(73.8%, 57.4%, 0%, 28.2%)
CIE-LAB	lab(36.92, 26.08, -58.79)
CIE-LCH	lch(36.92, 64.32, 293.92°)
OKLab	oklab(46.6% -0.0081 -0.1696)
OKLCH	oklch(46.6% 0.17 267.3)
XYZ	xyz(12.4876, 9.4947, 45.9651)
Luminance	0.0950 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304EB7 #B79930

analogous

#3091B7 #304EB7 #5630B7

triadic

#304EB7 #B7304E #4EB730

tetradic

#304EB7 #B73091 #B79930 #30B756

square

#304EB7 #B73091 #B79930 #30B756

split-complementary

#304EB7 #B75630 #91B730

monochromatic

#172556 #233987 #304EB7 #526FD2 #8397DE

Accessibility & contrast

On white

7.24

#304EB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#304EB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304EB7

7.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304EB7	#FFFFFF	#000000	##FFFFFF
##304EB7	1.00	7.24	2.90	7.24
#FFFFFF	7.24	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBB

Deuteranopia (green-blind)

#0051B5

Tritanopia (blue-blind)

#00687B

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #304eb7;
/* rgb */ color: rgb(48, 78, 183);
/* oklch */ color: oklch(46.6% 0.170 267.3);

Tailwind

colors: {
  custom: {
    50: '#7b7fcd',
    500: '#304eb7',
    950: '#000000',
  },
}

SCSS

$custom: #304eb7;
$custom-light: #7b7fcd;
$custom-dark: #000000;

JSON

{
  "hex": "#304eb7",
  "rgb": {
    "r": 48,
    "g": 78,
    "b": 183
  },
  "hsl": {
    "h": 226.667,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.46597,
    "c": 0.16975,
    "h": 267.3
  },
  "luminance": 0.09496
}

Semantic roles & 50–950 ramp

primary

#304EB7

secondary

#C8B77B

accent

#BF46E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #304EB7

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

Preview Lab → · Contrast checker → · Palette generator →