#303A9D#303A9D

#303A9D is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.5% C 0.159 H 272.6°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#303A9D
RGB	rgb(48, 58, 157)
HSL	hsl(234, 53%, 40%)
HSV	hsv(234, 69%, 62%)
CMYK	cmyk(69.4%, 63.1%, 0%, 38.4%)
CIE-LAB	lab(29.63, 29.63, -55.12)
CIE-LCH	lch(29.63, 62.58, 298.26°)
OKLab	oklab(40.52% 0.0073 -0.159)
OKLCH	oklch(40.52% 0.159 272.6)
XYZ	xyz(8.8157, 6.0880, 32.6023)
Luminance	0.0609 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303A9D #9D9330

analogous

#30719D #303A9D #5C309D

triadic

#303A9D #9D303A #3A9D30

tetradic

#303A9D #9D3071 #9D9330 #309D5C

square

#303A9D #9D3071 #9D9330 #309D5C

split-complementary

#303A9D #9D5C30 #719D30

monochromatic

#13173F #22296E #303A9D #4450C6 #737CD4

Accessibility & contrast

On white

9.47

#303A9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#303A9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303A9D

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303A9D	#FFFFFF	#000000	##FFFFFF
##303A9D	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA0

Deuteranopia (green-blind)

#00419B

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #303a9d;
/* rgb */ color: rgb(48, 58, 157);
/* oklch */ color: oklch(40.5% 0.159 272.6);

Tailwind

colors: {
  custom: {
    50: '#7770bb',
    500: '#303a9d',
    950: '#000000',
  },
}

SCSS

$custom: #303a9d;
$custom-light: #7770bb;
$custom-dark: #000000;

JSON

{
  "hex": "#303a9d",
  "rgb": {
    "r": 48,
    "g": 58,
    "b": 157
  },
  "hsl": {
    "h": 234.495,
    "s": 53.171,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40523,
    "c": 0.1592,
    "h": 272.6
  },
  "luminance": 0.06089
}

Semantic roles & 50–950 ramp

primary

#303A9D

secondary

#BCB56D

accent

#CF4BDD

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #303A9D

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

Preview Lab → · Contrast checker → · Palette generator →