#303D9C#303D9C

#303D9C is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.154 H 271.8°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#303D9C
RGB	rgb(48, 61, 156)
HSL	hsl(233, 53%, 40%)
HSV	hsv(233, 69%, 61%)
CMYK	cmyk(69.2%, 60.9%, 0%, 38.8%)
CIE-LAB	lab(30.32, 27.30, -53.40)
CIE-LCH	lch(30.32, 59.97, 297.07°)
OKLab	oklab(41% 0.0049 -0.1539)
OKLCH	oklch(41% 0.154 271.8)
XYZ	xyz(8.8864, 6.3653, 32.2064)
Luminance	0.0637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303D9C #9C8F30

analogous

#30739C #303D9C #59309C

triadic

#303D9C #9C303D #3D9C30

tetradic

#303D9C #9C3073 #9C8F30 #309C59

square

#303D9C #9C3073 #9C8F30 #309C59

split-complementary

#303D9C #9C5930 #739C30

monochromatic

#13183E #222B6D #303D9C #4453C5 #737ED4

Accessibility & contrast

On white

9.24

#303D9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#303D9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303D9C

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303D9C	#FFFFFF	#000000	##FFFFFF
##303D9C	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)

#004C9F

Deuteranopia (green-blind)

#00439A

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #303d9c;
/* rgb */ color: rgb(48, 61, 156);
/* oklch */ color: oklch(41.0% 0.154 271.8);

Tailwind

colors: {
  custom: {
    50: '#7672ba',
    500: '#303d9c',
    950: '#000000',
  },
}

SCSS

$custom: #303d9c;
$custom-light: #7672ba;
$custom-dark: #000000;

JSON

{
  "hex": "#303d9c",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 156
  },
  "hsl": {
    "h": 232.778,
    "s": 52.941,
    "l": 40
  },
  "oklch": {
    "l": 0.41001,
    "c": 0.15403,
    "h": 271.8
  },
  "luminance": 0.06366
}

Semantic roles & 50–950 ramp

primary

#303D9C

secondary

#BCB26C

accent

#CB4BDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303D9C

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

Preview Lab → · Contrast checker → · Palette generator →