#303EA9#303EA9

#303EA9 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.171 H 271.3°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#303EA9
RGB	rgb(48, 62, 169)
HSL	hsl(233, 56%, 43%)
HSV	hsv(233, 72%, 66%)
CMYK	cmyk(71.6%, 63.3%, 0%, 33.7%)
CIE-LAB	lab(31.66, 31.39, -59.05)
CIE-LCH	lch(31.66, 66.87, 297.99°)
OKLab	oklab(42.34% 0.0037 -0.1705)
OKLCH	oklch(42.34% 0.171 271.3)
XYZ	xyz(10.1006, 6.9372, 38.3351)
Luminance	0.0694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303EA9 #A99B30

analogous

#307AA9 #303EA9 #5F30A9

triadic

#303EA9 #A9303E #3EA930

tetradic

#303EA9 #A9307A #A99B30 #30A95F

square

#303EA9 #A9307A #A99B30 #30A95F

split-complementary

#303EA9 #A95F30 #7AA930

monochromatic

#151B4A #222D79 #303EA9 #4A59CC #7A85D9

Accessibility & contrast

On white

8.80

#303EA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#303EA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EA9

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EA9	#FFFFFF	#000000	##FFFFFF
##303EA9	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)

#0050AC

Deuteranopia (green-blind)

#0045A7

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #303ea9;
/* rgb */ color: rgb(48, 62, 169);
/* oklch */ color: oklch(42.3% 0.171 271.3);

Tailwind

colors: {
  custom: {
    50: '#7973c3',
    500: '#303ea9',
    950: '#000000',
  },
}

SCSS

$custom: #303ea9;
$custom-light: #7973c3;
$custom-dark: #000000;

JSON

{
  "hex": "#303ea9",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 169
  },
  "hsl": {
    "h": 233.058,
    "s": 55.76,
    "l": 42.549
  },
  "oklch": {
    "l": 0.42336,
    "c": 0.17054,
    "h": 271.3
  },
  "luminance": 0.06938
}

Semantic roles & 50–950 ramp

primary

#303EA9

secondary

#C2B973

accent

#CE49DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303EA9

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

Preview Lab → · Contrast checker → · Palette generator →