#303CB4#303CB4

#303CB4 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.0% C 0.187 H 271.3°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#303CB4
RGB	rgb(48, 60, 180)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(73.3%, 66.7%, 0%, 29.4%)
CIE-LAB	lab(32.16, 36.61, -64.80)
CIE-LCH	lch(32.16, 74.43, 299.47°)
OKLab	oklab(43% 0.0044 -0.1874)
OKLCH	oklch(43% 0.187 271.3)
XYZ	xyz(11.0702, 7.1542, 43.9687)
Luminance	0.0716 (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

#303CB4 #B4A830

analogous

#307EB4 #303CB4 #6630B4

triadic

#303CB4 #B4303C #3CB430

tetradic

#303CB4 #B4307E #B4A830 #30B466

square

#303CB4 #B4307E #B4A830 #30B466

split-complementary

#303CB4 #B46630 #7EB430

monochromatic

#161C53 #232C84 #303CB4 #515CD1 #8189DD

Accessibility & contrast

On white

8.64

#303CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#303CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CB4

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CB4	#FFFFFF	#000000	##FFFFFF
##303CB4	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303cb4;
/* rgb */ color: rgb(48, 60, 180);
/* oklch */ color: oklch(43.0% 0.187 271.3);

Tailwind

colors: {
  custom: {
    50: '#7c72cc',
    500: '#303cb4',
    950: '#000000',
  },
}

SCSS

$custom: #303cb4;
$custom-light: #7c72cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303cb4",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 180
  },
  "hsl": {
    "h": 234.545,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42996,
    "c": 0.18742,
    "h": 271.3
  },
  "luminance": 0.07155
}

Semantic roles & 50–950 ramp

primary

#303CB4

secondary

#C6BF79

accent

#D347E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #303CB4

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

Preview Lab → · Contrast checker → · Palette generator →