#304CB1#304CB1

#304CB1 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.7% C 0.164 H 267.6°. Best body text is #FFFFFF at 7.52:1 contrast (WCAG AA passes).

Color values

HEX	#304CB1
RGB	rgb(48, 76, 177)
HSL	hsl(227, 57%, 44%)
HSV	hsv(227, 73%, 69%)
CMYK	cmyk(72.9%, 57.1%, 0%, 30.6%)
CIE-LAB	lab(35.93, 25.16, -56.86)
CIE-LCH	lch(35.93, 62.18, 293.87°)
OKLab	oklab(45.71% -0.0068 -0.1639)
OKLCH	oklch(45.71% 0.164 267.6)
XYZ	xyz(11.7364, 8.9704, 42.6994)
Luminance	0.0897 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CB1 #B19530

analogous

#308DB1 #304CB1 #5530B1

triadic

#304CB1 #B1304C #4CB130

tetradic

#304CB1 #B1308D #B19530 #30B155

square

#304CB1 #B1308D #B19530 #30B155

split-complementary

#304CB1 #B15530 #8DB130

monochromatic

#162351 #233781 #304CB1 #4F6BCF #7F93DC

Accessibility & contrast

On white

7.52

#304CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#304CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CB1

7.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CB1	#FFFFFF	#000000	##FFFFFF
##304CB1	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)

#005BB4

Deuteranopia (green-blind)

#004FAF

Tritanopia (blue-blind)

#006577

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304cb1;
/* rgb */ color: rgb(48, 76, 177);
/* oklch */ color: oklch(45.7% 0.164 267.6);

Tailwind

colors: {
  custom: {
    50: '#7a7dc9',
    500: '#304cb1',
    950: '#000000',
  },
}

SCSS

$custom: #304cb1;
$custom-light: #7a7dc9;
$custom-dark: #000000;

JSON

{
  "hex": "#304cb1",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 177
  },
  "hsl": {
    "h": 226.977,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.45708,
    "c": 0.16406,
    "h": 267.6
  },
  "luminance": 0.08972
}

Semantic roles & 50–950 ramp

primary

#304CB1

secondary

#C5B478

accent

#BF47E1

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #304CB1

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

Preview Lab → · Contrast checker → · Palette generator →