#303D8A#303D8A

#303D8A is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.5% C 0.128 H 272.0°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#303D8A
RGB	rgb(48, 61, 138)
HSL	hsl(231, 48%, 36%)
HSV	hsv(231, 65%, 54%)
CMYK	cmyk(65.2%, 55.8%, 0%, 45.9%)
CIE-LAB	lab(28.90, 20.66, -44.67)
CIE-LCH	lch(28.90, 49.21, 294.82°)
OKLab	oklab(39.5% 0.0045 -0.1283)
OKLCH	oklch(39.5% 0.128 272)
XYZ	xyz(7.4736, 5.8002, 24.7655)
Luminance	0.0580 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303D8A #8A7D30

analogous

#306A8A #303D8A #50308A

triadic

#303D8A #8A303D #3D8A30

tetradic

#303D8A #8A306A #8A7D30 #308A50

square

#303D8A #8A306A #8A7D30 #308A50

split-complementary

#303D8A #8A5030 #6A8A30

monochromatic

#10152F #20295D #303D8A #4051B7 #6978CB

Accessibility & contrast

On white

9.72

#303D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#303D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303D8A

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303D8A	#FFFFFF	#000000	##FFFFFF
##303D8A	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05488D

Deuteranopia (green-blind)

#004088

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #303d8a;
/* rgb */ color: rgb(48, 61, 138);
/* oklch */ color: oklch(39.5% 0.128 272.0);

Tailwind

colors: {
  custom: {
    50: '#7372ad',
    500: '#303d8a',
    950: '#000000',
  },
}

SCSS

$custom: #303d8a;
$custom-light: #7372ad;
$custom-dark: #000000;

JSON

{
  "hex": "#303d8a",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 138
  },
  "hsl": {
    "h": 231.333,
    "s": 48.387,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39502,
    "c": 0.12834,
    "h": 272
  },
  "luminance": 0.05801
}

Semantic roles & 50–950 ramp

primary

#303D8A

secondary

#B2A764

accent

#C450D8

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #303D8A

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

Preview Lab → · Contrast checker → · Palette generator →