#304AB1#304AB1

#304AB1 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.3% C 0.167 H 268.2°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).

Color values

HEX	#304AB1
RGB	rgb(48, 74, 177)
HSL	hsl(228, 57%, 44%)
HSV	hsv(228, 73%, 69%)
CMYK	cmyk(72.9%, 58.2%, 0%, 30.6%)
CIE-LAB	lab(35.40, 26.48, -57.72)
CIE-LCH	lch(35.40, 63.50, 294.64°)
OKLab	oklab(45.31% -0.0053 -0.1665)
OKLCH	oklch(45.31% 0.167 268.2)
XYZ	xyz(11.6008, 8.6991, 42.6542)
Luminance	0.0870 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304AB1 #B19730

analogous

#308BB1 #304AB1 #5730B1

triadic

#304AB1 #B1304A #4AB130

tetradic

#304AB1 #B1308B #B19730 #30B157

square

#304AB1 #B1308B #B19730 #30B157

split-complementary

#304AB1 #B15730 #8BB130

monochromatic

#162251 #233681 #304AB1 #4F69CF #7F92DC

Accessibility & contrast

On white

7.66

#304AB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#304AB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304AB1

7.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304AB1	#FFFFFF	#000000	##FFFFFF
##304AB1	1.00	7.66	2.74	7.66
#FFFFFF	7.66	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B4

Deuteranopia (green-blind)

#004DAF

Tritanopia (blue-blind)

#006476

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #304ab1;
/* rgb */ color: rgb(48, 74, 177);
/* oklch */ color: oklch(45.3% 0.167 268.2);

Tailwind

colors: {
  custom: {
    50: '#7a7cc9',
    500: '#304ab1',
    950: '#000000',
  },
}

SCSS

$custom: #304ab1;
$custom-light: #7a7cc9;
$custom-dark: #000000;

JSON

{
  "hex": "#304ab1",
  "rgb": {
    "r": 48,
    "g": 74,
    "b": 177
  },
  "hsl": {
    "h": 227.907,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.45312,
    "c": 0.16656,
    "h": 268.2
  },
  "luminance": 0.087
}

Semantic roles & 50–950 ramp

primary

#304AB1

secondary

#C5B678

accent

#C247E1

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304AB1

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

Preview Lab → · Contrast checker → · Palette generator →