#303CB8#303CB8

#303CB8 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.4% C 0.193 H 271.2°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#303CB8
RGB	rgb(48, 60, 184)
HSL	hsl(235, 59%, 45%)
HSV	hsv(235, 74%, 72%)
CMYK	cmyk(73.9%, 67.4%, 0%, 27.8%)
CIE-LAB	lab(32.52, 38.03, -66.57)
CIE-LCH	lch(32.52, 76.66, 299.74°)
OKLab	oklab(43.38% 0.004 -0.1925)
OKLCH	oklch(43.38% 0.193 271.2)
XYZ	xyz(11.4836, 7.3196, 46.1457)
Luminance	0.0732 (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

#303CB8 #B8AC30

analogous

#3080B8 #303CB8 #6830B8

triadic

#303CB8 #B8303C #3CB830

tetradic

#303CB8 #B83080 #B8AC30 #30B868

square

#303CB8 #B83080 #B8AC30 #30B868

split-complementary

#303CB8 #B86830 #80B830

monochromatic

#171C57 #232C87 #303CB8 #535ED2 #848CDF

Accessibility & contrast

On white

8.52

#303CB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#303CB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CB8

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CB8	#FFFFFF	#000000	##FFFFFF
##303CB8	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BC

Deuteranopia (green-blind)

#0046B6

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303cb8;
/* rgb */ color: rgb(48, 60, 184);
/* oklch */ color: oklch(43.4% 0.193 271.2);

Tailwind

colors: {
  custom: {
    50: '#7d72ce',
    500: '#303cb8',
    950: '#000000',
  },
}

SCSS

$custom: #303cb8;
$custom-light: #7d72ce;
$custom-dark: #000000;

JSON

{
  "hex": "#303cb8",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 184
  },
  "hsl": {
    "h": 234.706,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43377,
    "c": 0.19258,
    "h": 271.2
  },
  "luminance": 0.07321
}

Semantic roles & 50–950 ramp

primary

#303CB8

secondary

#C8C17C

accent

#D446E2

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #303CB8

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

Preview Lab → · Contrast checker → · Palette generator →