#303C99#303C99

#303C99 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.151 H 272.2°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#303C99
RGB	rgb(48, 60, 153)
HSL	hsl(233, 52%, 39%)
HSV	hsv(233, 69%, 60%)
CMYK	cmyk(68.6%, 60.8%, 0%, 40%)
CIE-LAB	lab(29.81, 26.86, -52.40)
CIE-LCH	lch(29.81, 58.88, 297.14°)
OKLab	oklab(40.55% 0.0057 -0.151)
OKLCH	oklch(40.55% 0.151 272.2)
XYZ	xyz(8.5826, 6.1592, 30.8674)
Luminance	0.0616 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303C99 #998D30

analogous

#307199 #303C99 #593099

triadic

#303C99 #99303C #3C9930

tetradic

#303C99 #993071 #998D30 #309959

square

#303C99 #993071 #998D30 #309959

split-complementary

#303C99 #995930 #719930

monochromatic

#13173C #212A6A #303C99 #4251C4 #717CD2

Accessibility & contrast

On white

9.41

#303C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#303C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303C99

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303C99	#FFFFFF	#000000	##FFFFFF
##303C99	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#004297

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #303c99;
/* rgb */ color: rgb(48, 60, 153);
/* oklch */ color: oklch(40.5% 0.151 272.2);

Tailwind

colors: {
  custom: {
    50: '#7671b8',
    500: '#303c99',
    950: '#000000',
  },
}

SCSS

$custom: #303c99;
$custom-light: #7671b8;
$custom-dark: #000000;

JSON

{
  "hex": "#303c99",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 153
  },
  "hsl": {
    "h": 233.143,
    "s": 52.239,
    "l": 39.412
  },
  "oklch": {
    "l": 0.40549,
    "c": 0.15113,
    "h": 272.2
  },
  "luminance": 0.0616
}

Semantic roles & 50–950 ramp

primary

#303C99

secondary

#BAB16B

accent

#CB4CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #303C99

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

Preview Lab → · Contrast checker → · Palette generator →