#303DB5#303DB5

#303DB5 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.3% C 0.188 H 271.1°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#303DB5
RGB	rgb(48, 61, 181)
HSL	hsl(234, 58%, 45%)
HSV	hsv(234, 73%, 71%)
CMYK	cmyk(73.5%, 66.3%, 0%, 29%)
CIE-LAB	lab(32.48, 36.34, -64.86)
CIE-LCH	lch(32.48, 74.34, 299.26°)
OKLab	oklab(43.26% 0.0037 -0.1875)
OKLCH	oklch(43.26% 0.188 271.1)
XYZ	xyz(11.2253, 7.3009, 44.5247)
Luminance	0.0730 (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

#303DB5 #B5A830

analogous

#3080B5 #303DB5 #6530B5

triadic

#303DB5 #B5303D #3DB530

tetradic

#303DB5 #B53080 #B5A830 #30B565

square

#303DB5 #B53080 #B5A830 #30B565

split-complementary

#303DB5 #B56530 #80B530

monochromatic

#161C54 #232D85 #303DB5 #515ED1 #828BDE

Accessibility & contrast

On white

8.54

#303DB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#303DB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DB5

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DB5	#FFFFFF	#000000	##FFFFFF
##303DB5	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B9

Deuteranopia (green-blind)

#0046B3

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303db5;
/* rgb */ color: rgb(48, 61, 181);
/* oklch */ color: oklch(43.3% 0.188 271.1);

Tailwind

colors: {
  custom: {
    50: '#7c72cc',
    500: '#303db5',
    950: '#000000',
  },
}

SCSS

$custom: #303db5;
$custom-light: #7c72cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303db5",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 181
  },
  "hsl": {
    "h": 234.135,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43263,
    "c": 0.18757,
    "h": 271.1
  },
  "luminance": 0.07302
}

Semantic roles & 50–950 ramp

primary

#303DB5

secondary

#C7BF7A

accent

#D246E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #303DB5

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

Preview Lab → · Contrast checker → · Palette generator →