#303D9F#303D9F

#303D9F is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.3% C 0.158 H 271.7°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#303D9F
RGB	rgb(48, 61, 159)
HSL	hsl(233, 54%, 41%)
HSV	hsv(233, 70%, 62%)
CMYK	cmyk(69.8%, 61.6%, 0%, 37.6%)
CIE-LAB	lab(30.56, 28.39, -54.82)
CIE-LCH	lch(30.56, 61.73, 297.38°)
OKLab	oklab(41.26% 0.0048 -0.1581)
OKLCH	oklch(41.26% 0.158 271.7)
XYZ	xyz(9.1436, 6.4682, 33.5608)
Luminance	0.0647 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303D9F #9F9230

analogous

#30749F #303D9F #5A309F

triadic

#303D9F #9F303D #3D9F30

tetradic

#303D9F #9F3074 #9F9230 #309F5A

square

#303D9F #9F3074 #9F9230 #309F5A

split-complementary

#303D9F #9F5A30 #749F30

monochromatic

#141941 #222B70 #303D9F #4554C7 #7480D5

Accessibility & contrast

On white

9.16

#303D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#303D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303D9F

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303D9F	#FFFFFF	#000000	##FFFFFF
##303D9F	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00439D

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #303d9f;
/* rgb */ color: rgb(48, 61, 159);
/* oklch */ color: oklch(41.3% 0.158 271.7);

Tailwind

colors: {
  custom: {
    50: '#7772bc',
    500: '#303d9f',
    950: '#000000',
  },
}

SCSS

$custom: #303d9f;
$custom-light: #7772bc;
$custom-dark: #000000;

JSON

{
  "hex": "#303d9f",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 159
  },
  "hsl": {
    "h": 232.973,
    "s": 53.623,
    "l": 40.588
  },
  "oklch": {
    "l": 0.41262,
    "c": 0.15817,
    "h": 271.7
  },
  "luminance": 0.06469
}

Semantic roles & 50–950 ramp

primary

#303D9F

secondary

#BDB46E

accent

#CC4BDD

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303D9F

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

Preview Lab → · Contrast checker → · Palette generator →