#303A8F#303A8F

#303A8F is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.3% C 0.140 H 273.1°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#303A8F
RGB	rgb(48, 58, 143)
HSL	hsl(234, 50%, 37%)
HSV	hsv(234, 66%, 56%)
CMYK	cmyk(66.4%, 59.4%, 0%, 43.9%)
CIE-LAB	lab(28.48, 24.53, -48.44)
CIE-LCH	lch(28.48, 54.30, 296.85°)
OKLab	oklab(39.31% 0.0075 -0.1394)
OKLCH	oklch(39.31% 0.14 273.1)
XYZ	xyz(7.6883, 5.6370, 26.6642)
Luminance	0.0564 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303A8F #8F8530

analogous

#306A8F #303A8F #55308F

triadic

#303A8F #8F303A #3A8F30

tetradic

#303A8F #8F306A #8F8530 #308F55

square

#303A8F #8F306A #8F8530 #308F55

split-complementary

#303A8F #8F5530 #6A8F30

monochromatic

#111533 #212761 #303A8F #3F4DBD #6C76CE

Accessibility & contrast

On white

9.87

#303A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#303A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303A8F

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303A8F	#FFFFFF	#000000	##FFFFFF
##303A8F	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003F8D

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #303a8f;
/* rgb */ color: rgb(48, 58, 143);
/* oklch */ color: oklch(39.3% 0.140 273.1);

Tailwind

colors: {
  custom: {
    50: '#7470b0',
    500: '#303a8f',
    950: '#000000',
  },
}

SCSS

$custom: #303a8f;
$custom-light: #7470b0;
$custom-dark: #000000;

JSON

{
  "hex": "#303a8f",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 143
  },
  "hsl": {
    "h": 233.684,
    "s": 49.738,
    "l": 37.451
  },
  "oklch": {
    "l": 0.39306,
    "c": 0.1396,
    "h": 273.1
  },
  "luminance": 0.05638
}

Semantic roles & 50–950 ramp

primary

#303A8F

secondary

#B5AD66

accent

#CB4FD9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090711

muted

#7B7A80

Preview Lab

Preview with #303A8F

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

Preview Lab → · Contrast checker → · Palette generator →