#303CB5#303CB5

#303CB5 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.189 H 271.3°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#303CB5
RGB	rgb(48, 60, 181)
HSL	hsl(235, 58%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(73.5%, 66.9%, 0%, 29%)
CIE-LAB	lab(32.25, 36.97, -65.24)
CIE-LCH	lch(32.25, 74.99, 299.54°)
OKLab	oklab(43.09% 0.0043 -0.1887)
OKLCH	oklch(43.09% 0.189 271.3)
XYZ	xyz(11.1724, 7.1951, 44.5071)
Luminance	0.0720 (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

#303CB5 #B5A930

analogous

#307FB5 #303CB5 #6630B5

triadic

#303CB5 #B5303C #3CB530

tetradic

#303CB5 #B5307F #B5A930 #30B566

square

#303CB5 #B5307F #B5A930 #30B566

split-complementary

#303CB5 #B56630 #7FB530

monochromatic

#161C54 #232C85 #303CB5 #515DD1 #828ADE

Accessibility & contrast

On white

8.61

#303CB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#303CB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CB5

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CB5	#FFFFFF	#000000	##FFFFFF
##303CB5	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0046B3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #303cb5;
/* rgb */ color: rgb(48, 60, 181);
/* oklch */ color: oklch(43.1% 0.189 271.3);

Tailwind

colors: {
  custom: {
    50: '#7c72cc',
    500: '#303cb5',
    950: '#000000',
  },
}

SCSS

$custom: #303cb5;
$custom-light: #7c72cc;
$custom-dark: #000000;

JSON

{
  "hex": "#303cb5",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 181
  },
  "hsl": {
    "h": 234.586,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43091,
    "c": 0.18872,
    "h": 271.3
  },
  "luminance": 0.07196
}

Semantic roles & 50–950 ramp

primary

#303CB5

secondary

#C7C07A

accent

#D346E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #303CB5

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

Preview Lab → · Contrast checker → · Palette generator →