#303FA9#303FA9

#303FA9 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.169 H 271.0°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#303FA9
RGB	rgb(48, 63, 169)
HSL	hsl(233, 56%, 43%)
HSV	hsv(233, 72%, 66%)
CMYK	cmyk(71.6%, 62.7%, 0%, 33.7%)
CIE-LAB	lab(31.91, 30.73, -58.64)
CIE-LCH	lch(31.91, 66.20, 297.66°)
OKLab	oklab(42.52% 0.003 -0.1693)
OKLCH	oklch(42.52% 0.169 271)
XYZ	xyz(10.1554, 7.0470, 38.3534)
Luminance	0.0705 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303FA9 #A99A30

analogous

#307BA9 #303FA9 #5E30A9

triadic

#303FA9 #A9303F #3FA930

tetradic

#303FA9 #A9307B #A99A30 #30A95E

square

#303FA9 #A9307B #A99A30 #30A95E

split-complementary

#303FA9 #A95E30 #7BA930

monochromatic

#151B4A #222D79 #303FA9 #4A5ACC #7A86D9

Accessibility & contrast

On white

8.72

#303FA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#303FA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303FA9

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303FA9	#FFFFFF	#000000	##FFFFFF
##303FA9	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AC

Deuteranopia (green-blind)

#0046A7

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303fa9;
/* rgb */ color: rgb(48, 63, 169);
/* oklch */ color: oklch(42.5% 0.169 271.0);

Tailwind

colors: {
  custom: {
    50: '#7974c3',
    500: '#303fa9',
    950: '#000000',
  },
}

SCSS

$custom: #303fa9;
$custom-light: #7974c3;
$custom-dark: #000000;

JSON

{
  "hex": "#303fa9",
  "rgb": {
    "r": 48,
    "g": 63,
    "b": 169
  },
  "hsl": {
    "h": 232.562,
    "s": 55.76,
    "l": 42.549
  },
  "oklch": {
    "l": 0.4252,
    "c": 0.16932,
    "h": 271
  },
  "luminance": 0.07048
}

Semantic roles & 50–950 ramp

primary

#303FA9

secondary

#C2B873

accent

#CC49DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303FA9

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

Preview Lab → · Contrast checker → · Palette generator →