#304FA3#304FA3

#304FA3 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.2% C 0.141 H 265.8°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#304FA3
RGB	rgb(48, 79, 163)
HSL	hsl(224, 55%, 41%)
HSV	hsv(224, 71%, 64%)
CMYK	cmyk(70.6%, 51.5%, 0%, 36.1%)
CIE-LAB	lab(35.72, 17.92, -48.86)
CIE-LCH	lch(35.72, 52.04, 290.14°)
OKLab	oklab(45.23% -0.0104 -0.1403)
OKLCH	oklch(45.23% 0.141 265.8)
XYZ	xyz(10.6235, 8.8636, 35.7942)
Luminance	0.0887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304FA3 #A38430

analogous

#3089A3 #304FA3 #4B30A3

triadic

#304FA3 #A3304F #4FA330

tetradic

#304FA3 #A33089 #A38430 #30A34B

square

#304FA3 #A33089 #A38430 #30A34B

split-complementary

#304FA3 #A34B30 #89A330

monochromatic

#142144 #223874 #304FA3 #476AC9 #7791D7

Accessibility & contrast

On white

7.57

#304FA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#304FA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304FA3

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304FA3	#FFFFFF	#000000	##FFFFFF
##304FA3	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)

#1C5AA6

Deuteranopia (green-blind)

#004FA1

Tritanopia (blue-blind)

#006371

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #304fa3;
/* rgb */ color: rgb(48, 79, 163);
/* oklch */ color: oklch(45.2% 0.141 265.8);

Tailwind

colors: {
  custom: {
    50: '#777fbf',
    500: '#304fa3',
    950: '#000000',
  },
}

SCSS

$custom: #304fa3;
$custom-light: #777fbf;
$custom-dark: #000000;

JSON

{
  "hex": "#304fa3",
  "rgb": {
    "r": 48,
    "g": 79,
    "b": 163
  },
  "hsl": {
    "h": 223.826,
    "s": 54.502,
    "l": 41.373
  },
  "oklch": {
    "l": 0.45227,
    "c": 0.14071,
    "h": 265.8
  },
  "luminance": 0.08865
}

Semantic roles & 50–950 ramp

primary

#304FA3

secondary

#BFAA70

accent

#B64ADE

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #304FA3

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

Preview Lab → · Contrast checker → · Palette generator →