#304BB4#304BB4

#304BB4 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.8% C 0.169 H 268.0°. Best body text is #FFFFFF at 7.52:1 contrast (WCAG AA passes).

Color values

HEX	#304BB4
RGB	rgb(48, 75, 180)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 73%, 71%)
CMYK	cmyk(73.3%, 58.3%, 0%, 29.4%)
CIE-LAB	lab(35.90, 26.93, -58.69)
CIE-LCH	lch(35.90, 64.57, 294.65°)
OKLab	oklab(45.76% -0.0059 -0.1693)
OKLCH	oklch(45.76% 0.169 268)
XYZ	xyz(11.9704, 8.9546, 44.2687)
Luminance	0.0896 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304BB4 #B49930

analogous

#308DB4 #304BB4 #5730B4

triadic

#304BB4 #B4304B #4BB430

tetradic

#304BB4 #B4308D #B49930 #30B457

square

#304BB4 #B4308D #B49930 #30B457

split-complementary

#304BB4 #B45730 #8DB430

monochromatic

#162353 #233784 #304BB4 #516BD1 #8194DD

Accessibility & contrast

On white

7.52

#304BB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#304BB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304BB4

7.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304BB4	#FFFFFF	#000000	##FFFFFF
##304BB4	1.00	7.52	2.79	7.52
#FFFFFF	7.52	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB8

Deuteranopia (green-blind)

#004FB2

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304bb4;
/* rgb */ color: rgb(48, 75, 180);
/* oklch */ color: oklch(45.8% 0.169 268.0);

Tailwind

colors: {
  custom: {
    50: '#7b7ccb',
    500: '#304bb4',
    950: '#000000',
  },
}

SCSS

$custom: #304bb4;
$custom-light: #7b7ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#304bb4",
  "rgb": {
    "r": 48,
    "g": 75,
    "b": 180
  },
  "hsl": {
    "h": 227.727,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.45758,
    "c": 0.1694,
    "h": 268
  },
  "luminance": 0.08956
}

Semantic roles & 50–950 ramp

primary

#304BB4

secondary

#C6B779

accent

#C247E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304BB4

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

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