#304DA3#304DA3

#304DA3 is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.8% C 0.143 H 266.6°. Best body text is #FFFFFF at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#304DA3
RGB	rgb(48, 77, 163)
HSL	hsl(225, 55%, 41%)
HSV	hsv(225, 71%, 64%)
CMYK	cmyk(70.6%, 52.8%, 0%, 36.1%)
CIE-LAB	lab(35.16, 19.25, -49.76)
CIE-LCH	lch(35.16, 53.35, 291.15°)
OKLab	oklab(44.8% -0.0086 -0.143)
OKLCH	oklch(44.8% 0.143 266.6)
XYZ	xyz(10.4814, 8.5794, 35.7468)
Luminance	0.0858 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304DA3 #A38630

analogous

#3087A3 #304DA3 #4D30A3

triadic

#304DA3 #A3304D #4DA330

tetradic

#304DA3 #A33087 #A38630 #30A34D

square

#304DA3 #A33087 #A38630 #30A34D

split-complementary

#304DA3 #A34D30 #87A330

monochromatic

#142044 #223774 #304DA3 #4768C9 #778FD7

Accessibility & contrast

On white

7.73

#304DA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#304DA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304DA3

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304DA3	#FFFFFF	#000000	##FFFFFF
##304DA3	1.00	7.73	2.72	7.73
#FFFFFF	7.73	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1558A6

Deuteranopia (green-blind)

#004EA1

Tritanopia (blue-blind)

#006170

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #304da3;
/* rgb */ color: rgb(48, 77, 163);
/* oklch */ color: oklch(44.8% 0.143 266.6);

Tailwind

colors: {
  custom: {
    50: '#777ebf',
    500: '#304da3',
    950: '#000000',
  },
}

SCSS

$custom: #304da3;
$custom-light: #777ebf;
$custom-dark: #000000;

JSON

{
  "hex": "#304da3",
  "rgb": {
    "r": 48,
    "g": 77,
    "b": 163
  },
  "hsl": {
    "h": 224.87,
    "s": 54.502,
    "l": 41.373
  },
  "oklch": {
    "l": 0.44803,
    "c": 0.14328,
    "h": 266.6
  },
  "luminance": 0.0858
}

Semantic roles & 50–950 ramp

primary

#304DA3

secondary

#BFAB70

accent

#B94ADE

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#0A0912

muted

#7C7B81

Preview Lab

Preview with #304DA3

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

Preview Lab → · Contrast checker → · Palette generator →