#303C9F#303C9F

#303C9F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.159 H 272.0°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#303C9F
RGB	rgb(48, 60, 159)
HSL	hsl(234, 54%, 41%)
HSV	hsv(234, 70%, 62%)
CMYK	cmyk(69.8%, 62.3%, 0%, 37.6%)
CIE-LAB	lab(30.31, 29.05, -55.23)
CIE-LCH	lch(30.31, 62.41, 297.74°)
OKLab	oklab(41.07% 0.0056 -0.1593)
OKLCH	oklch(41.07% 0.159 272)
XYZ	xyz(9.0907, 6.3624, 33.5432)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303C9F #9F9330

analogous

#30739F #303C9F #5C309F

triadic

#303C9F #9F303C #3C9F30

tetradic

#303C9F #9F3073 #9F9330 #309F5C

square

#303C9F #9F3073 #9F9330 #309F5C

split-complementary

#303C9F #9F5C30 #739F30

monochromatic

#141941 #222A70 #303C9F #4553C7 #747FD5

Accessibility & contrast

On white

9.24

#303C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#303C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303C9F

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303C9F	#FFFFFF	#000000	##FFFFFF
##303C9F	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00429D

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #303c9f;
/* rgb */ color: rgb(48, 60, 159);
/* oklch */ color: oklch(41.1% 0.159 272.0);

Tailwind

colors: {
  custom: {
    50: '#7771bc',
    500: '#303c9f',
    950: '#000000',
  },
}

SCSS

$custom: #303c9f;
$custom-light: #7771bc;
$custom-dark: #000000;

JSON

{
  "hex": "#303c9f",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 159
  },
  "hsl": {
    "h": 233.514,
    "s": 53.623,
    "l": 40.588
  },
  "oklch": {
    "l": 0.41074,
    "c": 0.15943,
    "h": 272
  },
  "luminance": 0.06363
}

Semantic roles & 50–950 ramp

primary

#303C9F

secondary

#BDB46E

accent

#CD4BDD

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #303C9F

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

Preview Lab → · Contrast checker → · Palette generator →