#303CB9#303CB9

#303CB9 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.5% C 0.194 H 271.2°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#303CB9
RGB	rgb(48, 60, 185)
HSL	hsl(235, 59%, 46%)
HSV	hsv(235, 74%, 73%)
CMYK	cmyk(74.1%, 67.6%, 0%, 27.5%)
CIE-LAB	lab(32.62, 38.38, -67.01)
CIE-LCH	lch(32.62, 77.22, 299.80°)
OKLab	oklab(43.47% 0.0039 -0.1938)
OKLCH	oklch(43.47% 0.194 271.2)
XYZ	xyz(11.5888, 7.3617, 46.6997)
Luminance	0.0736 (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

#303CB9 #B9AD30

analogous

#3080B9 #303CB9 #6930B9

triadic

#303CB9 #B9303C #3CB930

tetradic

#303CB9 #B93080 #B9AD30 #30B969

square

#303CB9 #B93080 #B9AD30 #30B969

split-complementary

#303CB9 #B96930 #80B930

monochromatic

#171C58 #232C88 #303CB9 #545FD3 #848CDF

Accessibility & contrast

On white

8.49

#303CB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#303CB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303CB9

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303CB9	#FFFFFF	#000000	##FFFFFF
##303CB9	1.00	8.49	2.47	8.49
#FFFFFF	8.49	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BD

Deuteranopia (green-blind)

#0046B7

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #303cb9;
/* rgb */ color: rgb(48, 60, 185);
/* oklch */ color: oklch(43.5% 0.194 271.2);

Tailwind

colors: {
  custom: {
    50: '#7d72cf',
    500: '#303cb9',
    950: '#000000',
  },
}

SCSS

$custom: #303cb9;
$custom-light: #7d72cf;
$custom-dark: #000000;

JSON

{
  "hex": "#303cb9",
  "rgb": {
    "r": 48,
    "g": 60,
    "b": 185
  },
  "hsl": {
    "h": 234.745,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43472,
    "c": 0.19386,
    "h": 271.2
  },
  "luminance": 0.07363
}

Semantic roles & 50–950 ramp

primary

#303CB9

secondary

#C9C27C

accent

#D446E2

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #303CB9

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

Preview Lab → · Contrast checker → · Palette generator →