#303BB4#303BB4

#303BB4 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.8% C 0.189 H 271.5°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#303BB4
RGB	rgb(48, 59, 180)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(73.3%, 67.2%, 0%, 29.4%)
CIE-LAB	lab(31.92, 37.24, -65.19)
CIE-LCH	lch(31.92, 75.07, 299.74°)
OKLab	oklab(42.83% 0.005 -0.1885)
OKLCH	oklch(42.83% 0.189 271.5)
XYZ	xyz(11.0183, 7.0505, 43.9514)
Luminance	0.0705 (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

#303BB4 #B4A930

analogous

#307DB4 #303BB4 #6730B4

triadic

#303BB4 #B4303B #3BB430

tetradic

#303BB4 #B4307D #B4A930 #30B467

square

#303BB4 #B4307D #B4A930 #30B467

split-complementary

#303BB4 #B46730 #7DB430

monochromatic

#161B53 #232B84 #303BB4 #515BD1 #8189DD

Accessibility & contrast

On white

8.71

#303BB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#303BB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303BB4

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303BB4	#FFFFFF	#000000	##FFFFFF
##303BB4	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303bb4;
/* rgb */ color: rgb(48, 59, 180);
/* oklch */ color: oklch(42.8% 0.189 271.5);

Tailwind

colors: {
  custom: {
    50: '#7c71cc',
    500: '#303bb4',
    950: '#000000',
  },
}

SCSS

$custom: #303bb4;
$custom-light: #7c71cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303bb4",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 180
  },
  "hsl": {
    "h": 235,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42826,
    "c": 0.18857,
    "h": 271.5
  },
  "luminance": 0.07052
}

Semantic roles & 50–950 ramp

primary

#303BB4

secondary

#C6C079

accent

#D447E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #303BB4

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

Preview Lab → · Contrast checker → · Palette generator →