#303CB2#303CB2

#303CB2 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.8% C 0.185 H 271.4°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#303CB2
RGB	rgb(48, 60, 178)
HSL	hsl(234, 58%, 44%)
HSV	hsv(234, 73%, 70%)
CMYK	cmyk(73%, 66.3%, 0%, 30.2%)
CIE-LAB	lab(31.97, 35.90, -63.91)
CIE-LCH	lch(31.97, 73.31, 299.32°)
OKLab	oklab(42.81% 0.0046 -0.1848)
OKLCH	oklch(42.81% 0.185 271.4)
XYZ	xyz(10.8679, 7.0733, 42.9034)
Luminance	0.0707 (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

#303CB2 #B2A630

analogous

#307DB2 #303CB2 #6530B2

triadic

#303CB2 #B2303C #3CB230

tetradic

#303CB2 #B2307D #B2A630 #30B265

square

#303CB2 #B2307D #B2A630 #30B265

split-complementary

#303CB2 #B26530 #7DB230

monochromatic

#161C52 #232C82 #303CB2 #505BD0 #8088DD

Accessibility & contrast

On white

8.70

#303CB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#303CB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CB2

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CB2	#FFFFFF	#000000	##FFFFFF
##303CB2	1.00	8.70	2.41	8.70
#FFFFFF	8.70	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B6

Deuteranopia (green-blind)

#0045B0

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303cb2;
/* rgb */ color: rgb(48, 60, 178);
/* oklch */ color: oklch(42.8% 0.185 271.4);

Tailwind

colors: {
  custom: {
    50: '#7b72ca',
    500: '#303cb2',
    950: '#000000',
  },
}

SCSS

$custom: #303cb2;
$custom-light: #7b72ca;
$custom-dark: #000000;

JSON

{
  "hex": "#303cb2",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 178
  },
  "hsl": {
    "h": 234.462,
    "s": 57.522,
    "l": 44.314
  },
  "oklch": {
    "l": 0.42808,
    "c": 0.18483,
    "h": 271.4
  },
  "luminance": 0.07074
}

Semantic roles & 50–950 ramp

primary

#303CB2

secondary

#C6BE78

accent

#D347E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303CB2

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

Preview Lab → · Contrast checker → · Palette generator →