#303E8A#303E8A

#303E8A is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.7% C 0.127 H 271.6°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#303E8A
RGB	rgb(48, 62, 138)
HSL	hsl(231, 48%, 36%)
HSV	hsv(231, 65%, 54%)
CMYK	cmyk(65.2%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(29.18, 19.98, -44.22)
CIE-LCH	lch(29.18, 48.52, 294.32°)
OKLab	oklab(39.71% 0.0035 -0.1269)
OKLCH	oklch(39.71% 0.127 271.6)
XYZ	xyz(7.5275, 5.9080, 24.7835)
Luminance	0.0591 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303E8A #8A7C30

analogous

#306B8A #303E8A #4F308A

triadic

#303E8A #8A303E #3E8A30

tetradic

#303E8A #8A306B #8A7C30 #308A4F

square

#303E8A #8A306B #8A7C30 #308A4F

split-complementary

#303E8A #8A4F30 #6B8A30

monochromatic

#10152F #202A5D #303E8A #4052B7 #6979CB

Accessibility & contrast

On white

9.63

#303E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#303E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303E8A

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303E8A	#FFFFFF	#000000	##FFFFFF
##303E8A	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A498D

Deuteranopia (green-blind)

#004188

Tritanopia (blue-blind)

#00505D

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #303e8a;
/* rgb */ color: rgb(48, 62, 138);
/* oklch */ color: oklch(39.7% 0.127 271.6);

Tailwind

colors: {
  custom: {
    50: '#7273ad',
    500: '#303e8a',
    950: '#000000',
  },
}

SCSS

$custom: #303e8a;
$custom-light: #7273ad;
$custom-dark: #000000;

JSON

{
  "hex": "#303e8a",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 230.667,
    "s": 48.387,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39709,
    "c": 0.12698,
    "h": 271.6
  },
  "luminance": 0.05909
}

Semantic roles & 50–950 ramp

primary

#303E8A

secondary

#B2A664

accent

#C350D8

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #303E8A

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

Preview Lab → · Contrast checker → · Palette generator →