#303FA6#303FA6

#303FA6 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.165 H 271.1°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#303FA6
RGB	rgb(48, 63, 166)
HSL	hsl(232, 55%, 42%)
HSV	hsv(232, 71%, 65%)
CMYK	cmyk(71.1%, 62%, 0%, 34.9%)
CIE-LAB	lab(31.66, 29.64, -57.25)
CIE-LCH	lch(31.66, 64.47, 297.37°)
OKLab	oklab(42.25% 0.0031 -0.1652)
OKLCH	oklch(42.25% 0.165 271.1)
XYZ	xyz(9.8770, 6.9356, 36.8872)
Luminance	0.0694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FA6 #A69730

analogous

#307AA6 #303FA6 #5C30A6

triadic

#303FA6 #A6303F #3FA630

tetradic

#303FA6 #A6307A #A69730 #30A65C

square

#303FA6 #A6307A #A69730 #30A65C

split-complementary

#303FA6 #A65C30 #7AA630

monochromatic

#151B47 #222D77 #303FA6 #4959CA #7885D8

Accessibility & contrast

On white

8.80

#303FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#303FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FA6

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FA6	#FFFFFF	#000000	##FFFFFF
##303FA6	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A9

Deuteranopia (green-blind)

#0045A4

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303fa6;
/* rgb */ color: rgb(48, 63, 166);
/* oklch */ color: oklch(42.3% 0.165 271.1);

Tailwind

colors: {
  custom: {
    50: '#7874c1',
    500: '#303fa6',
    950: '#000000',
  },
}

SCSS

$custom: #303fa6;
$custom-light: #7874c1;
$custom-dark: #000000;

JSON

{
  "hex": "#303fa6",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 232.373,
    "s": 55.14,
    "l": 41.961
  },
  "oklch": {
    "l": 0.42254,
    "c": 0.16526,
    "h": 271.1
  },
  "luminance": 0.06937
}

Semantic roles & 50–950 ramp

primary

#303FA6

secondary

#C0B671

accent

#CC49DE

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303FA6

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

Preview Lab → · Contrast checker → · Palette generator →