#303DA9#303DA9

#303DA9 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.2% C 0.172 H 271.5°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX	#303DA9
RGB	rgb(48, 61, 169)
HSL	hsl(234, 56%, 43%)
HSV	hsv(234, 72%, 66%)
CMYK	cmyk(71.6%, 63.9%, 0%, 33.7%)
CIE-LAB	lab(31.42, 32.03, -59.45)
CIE-LCH	lch(31.42, 67.53, 298.32°)
OKLab	oklab(42.15% 0.0045 -0.1717)
OKLCH	oklch(42.15% 0.172 271.5)
XYZ	xyz(10.0467, 6.8294, 38.3172)
Luminance	0.0683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303DA9 #A99C30

analogous

#3079A9 #303DA9 #6030A9

triadic

#303DA9 #A9303D #3DA930

tetradic

#303DA9 #A93079 #A99C30 #30A960

square

#303DA9 #A93079 #A99C30 #30A960

split-complementary

#303DA9 #A96030 #79A930

monochromatic

#151B4A #222C79 #303DA9 #4A58CC #7A84D9

Accessibility & contrast

On white

8.88

#303DA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#303DA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DA9

8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DA9	#FFFFFF	#000000	##FFFFFF
##303DA9	1.00	8.88	2.37	8.88
#FFFFFF	8.88	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AC

Deuteranopia (green-blind)

#0044A7

Tritanopia (blue-blind)

#00596D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303da9;
/* rgb */ color: rgb(48, 61, 169);
/* oklch */ color: oklch(42.2% 0.172 271.5);

Tailwind

colors: {
  custom: {
    50: '#7972c4',
    500: '#303da9',
    950: '#000000',
  },
}

SCSS

$custom: #303da9;
$custom-light: #7972c4;
$custom-dark: #000000;

JSON

{
  "hex": "#303da9",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 169
  },
  "hsl": {
    "h": 233.554,
    "s": 55.76,
    "l": 42.549
  },
  "oklch": {
    "l": 0.42154,
    "c": 0.17176,
    "h": 271.5
  },
  "luminance": 0.0683
}

Semantic roles & 50–950 ramp

primary

#303DA9

secondary

#C2B973

accent

#CF49DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303DA9

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

Preview Lab → · Contrast checker → · Palette generator →