#303E99#303E99

#303E99 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.9% C 0.149 H 271.5°. Best body text is #FFFFFF at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#303E99
RGB	rgb(48, 62, 153)
HSL	hsl(232, 52%, 39%)
HSV	hsv(232, 69%, 60%)
CMYK	cmyk(68.6%, 59.5%, 0%, 40%)
CIE-LAB	lab(30.33, 25.53, -51.55)
CIE-LCH	lch(30.33, 57.52, 296.35°)
OKLab	oklab(40.94% 0.004 -0.1485)
OKLCH	oklch(40.94% 0.149 271.5)
XYZ	xyz(8.6894, 6.3727, 30.9029)
Luminance	0.0637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303E99 #998B30

analogous

#307399 #303E99 #573099

triadic

#303E99 #99303E #3E9930

tetradic

#303E99 #993073 #998B30 #309957

square

#303E99 #993073 #998B30 #309957

split-complementary

#303E99 #995730 #739930

monochromatic

#13183C #212B6A #303E99 #4254C4 #717ED2

Accessibility & contrast

On white

9.23

#303E99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#303E99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303E99

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303E99	#FFFFFF	#000000	##FFFFFF
##303E99	1.00	9.23	2.27	9.23
#FFFFFF	9.23	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004397

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #303e99;
/* rgb */ color: rgb(48, 62, 153);
/* oklch */ color: oklch(40.9% 0.149 271.5);

Tailwind

colors: {
  custom: {
    50: '#7673b8',
    500: '#303e99',
    950: '#000000',
  },
}

SCSS

$custom: #303e99;
$custom-light: #7673b8;
$custom-dark: #000000;

JSON

{
  "hex": "#303e99",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 153
  },
  "hsl": {
    "h": 232,
    "s": 52.239,
    "l": 39.412
  },
  "oklch": {
    "l": 0.40938,
    "c": 0.14854,
    "h": 271.5
  },
  "luminance": 0.06374
}

Semantic roles & 50–950 ramp

primary

#303E99

secondary

#BAB06B

accent

#C94CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #303E99

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

Preview Lab → · Contrast checker → · Palette generator →