#304AB4#304AB4

#304AB4 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.6% C 0.171 H 268.3°. Best body text is #FFFFFF at 7.60:1 contrast (WCAG AA passes).

Color values

HEX	#304AB4
RGB	rgb(48, 74, 180)
HSL	hsl(228, 58%, 45%)
HSV	hsv(228, 73%, 71%)
CMYK	cmyk(73.3%, 58.9%, 0%, 29.4%)
CIE-LAB	lab(35.64, 27.59, -59.11)
CIE-LCH	lch(35.64, 65.23, 295.02°)
OKLab	oklab(45.56% -0.0052 -0.1706)
OKLCH	oklch(45.56% 0.171 268.3)
XYZ	xyz(11.9031, 8.8200, 44.2463)
Luminance	0.0882 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304AB4 #B49A30

analogous

#308CB4 #304AB4 #5830B4

triadic

#304AB4 #B4304A #4AB430

tetradic

#304AB4 #B4308C #B49A30 #30B458

square

#304AB4 #B4308C #B49A30 #30B458

split-complementary

#304AB4 #B45830 #8CB430

monochromatic

#162253 #233684 #304AB4 #516AD1 #8193DD

Accessibility & contrast

On white

7.60

#304AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#304AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304AB4

7.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304AB4	#FFFFFF	#000000	##FFFFFF
##304AB4	1.00	7.60	2.76	7.60
#FFFFFF	7.60	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB8

Deuteranopia (green-blind)

#004EB2

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304ab4;
/* rgb */ color: rgb(48, 74, 180);
/* oklch */ color: oklch(45.6% 0.171 268.3);

Tailwind

colors: {
  custom: {
    50: '#7b7ccb',
    500: '#304ab4',
    950: '#000000',
  },
}

SCSS

$custom: #304ab4;
$custom-light: #7b7ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#304ab4",
  "rgb": {
    "r": 48,
    "g": 74,
    "b": 180
  },
  "hsl": {
    "h": 228.182,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.45563,
    "c": 0.17064,
    "h": 268.3
  },
  "luminance": 0.08821
}

Semantic roles & 50–950 ramp

primary

#304AB4

secondary

#C6B779

accent

#C347E1

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304AB4

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

Preview Lab → · Contrast checker → · Palette generator →