#304BB2#304BB2

#304BB2 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.6% C 0.167 H 267.9°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#304BB2
RGB	rgb(48, 75, 178)
HSL	hsl(228, 58%, 44%)
HSV	hsv(228, 73%, 70%)
CMYK	cmyk(73%, 57.9%, 0%, 30.2%)
CIE-LAB	lab(35.74, 26.19, -57.76)
CIE-LCH	lch(35.74, 63.42, 294.39°)
OKLab	oklab(45.59% -0.006 -0.1666)
OKLCH	oklch(45.59% 0.167 267.9)
XYZ	xyz(11.7681, 8.8737, 43.2034)
Luminance	0.0887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304BB2 #B29730

analogous

#308CB2 #304BB2 #5630B2

triadic

#304BB2 #B2304B #4BB230

tetradic

#304BB2 #B2308C #B29730 #30B256

square

#304BB2 #B2308C #B29730 #30B256

split-complementary

#304BB2 #B25630 #8CB230

monochromatic

#162252 #233782 #304BB2 #506AD0 #8093DD

Accessibility & contrast

On white

7.57

#304BB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#304BB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304BB2

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304BB2	#FFFFFF	#000000	##FFFFFF
##304BB2	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB5

Deuteranopia (green-blind)

#004EB0

Tritanopia (blue-blind)

#006577

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304bb2;
/* rgb */ color: rgb(48, 75, 178);
/* oklch */ color: oklch(45.6% 0.167 267.9);

Tailwind

colors: {
  custom: {
    50: '#7a7cca',
    500: '#304bb2',
    950: '#000000',
  },
}

SCSS

$custom: #304bb2;
$custom-light: #7a7cca;
$custom-dark: #000000;

JSON

{
  "hex": "#304bb2",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 178
  },
  "hsl": {
    "h": 227.538,
    "s": 57.522,
    "l": 44.314
  },
  "oklch": {
    "l": 0.45592,
    "c": 0.16668,
    "h": 267.9
  },
  "luminance": 0.08875
}

Semantic roles & 50–950 ramp

primary

#304BB2

secondary

#C6B678

accent

#C147E1

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304BB2

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

Preview Lab → · Contrast checker → · Palette generator →