#303DB9#303DB9

#303DB9 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.193 H 271.0°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#303DB9
RGB	rgb(48, 61, 185)
HSL	hsl(234, 59%, 46%)
HSV	hsv(234, 74%, 73%)
CMYK	cmyk(74.1%, 67%, 0%, 27.5%)
CIE-LAB	lab(32.85, 37.76, -66.63)
CIE-LCH	lch(32.85, 76.58, 299.54°)
OKLab	oklab(43.64% 0.0034 -0.1927)
OKLCH	oklch(43.64% 0.193 271)
XYZ	xyz(11.6416, 7.4674, 46.7174)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303DB9 #B9AC30

analogous

#3081B9 #303DB9 #6830B9

triadic

#303DB9 #B9303D #3DB930

tetradic

#303DB9 #B93081 #B9AC30 #30B968

square

#303DB9 #B93081 #B9AC30 #30B968

split-complementary

#303DB9 #B96830 #81B930

monochromatic

#171D58 #232D88 #303DB9 #5460D3 #848DDF

Accessibility & contrast

On white

8.42

#303DB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#303DB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DB9

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DB9	#FFFFFF	#000000	##FFFFFF
##303DB9	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BD

Deuteranopia (green-blind)

#0047B7

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303db9;
/* rgb */ color: rgb(48, 61, 185);
/* oklch */ color: oklch(43.6% 0.193 271.0);

Tailwind

colors: {
  custom: {
    50: '#7d73cf',
    500: '#303db9',
    950: '#000000',
  },
}

SCSS

$custom: #303db9;
$custom-light: #7d73cf;
$custom-dark: #000000;

JSON

{
  "hex": "#303db9",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 185
  },
  "hsl": {
    "h": 234.307,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43641,
    "c": 0.19273,
    "h": 271
  },
  "luminance": 0.07469
}

Semantic roles & 50–950 ramp

primary

#303DB9

secondary

#C9C17C

accent

#D346E2

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #303DB9

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

Preview Lab → · Contrast checker → · Palette generator →