#303DA4#303DA4

#303DA4 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.7% C 0.165 H 271.6°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#303DA4
RGB	rgb(48, 61, 164)
HSL	hsl(233, 55%, 42%)
HSV	hsv(233, 71%, 64%)
CMYK	cmyk(70.7%, 62.8%, 0%, 35.7%)
CIE-LAB	lab(30.99, 30.22, -57.15)
CIE-LCH	lch(30.99, 64.65, 297.87°)
OKLab	oklab(41.7% 0.0047 -0.165)
OKLCH	oklch(41.7% 0.165 271.6)
XYZ	xyz(9.5862, 6.6453, 35.8922)
Luminance	0.0665 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303DA4 #A49730

analogous

#3077A4 #303DA4 #5D30A4

triadic

#303DA4 #A4303D #3DA430

tetradic

#303DA4 #A43077 #A49730 #30A45D

square

#303DA4 #A43077 #A49730 #30A45D

split-complementary

#303DA4 #A45D30 #77A430

monochromatic

#141A45 #222B75 #303DA4 #4856C9 #7782D7

Accessibility & contrast

On white

9.02

#303DA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#303DA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DA4

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DA4	#FFFFFF	#000000	##FFFFFF
##303DA4	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0044A2

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #303da4;
/* rgb */ color: rgb(48, 61, 164);
/* oklch */ color: oklch(41.7% 0.165 271.6);

Tailwind

colors: {
  custom: {
    50: '#7872c0',
    500: '#303da4',
    950: '#000000',
  },
}

SCSS

$custom: #303da4;
$custom-light: #7872c0;
$custom-dark: #000000;

JSON

{
  "hex": "#303da4",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 164
  },
  "hsl": {
    "h": 233.276,
    "s": 54.717,
    "l": 41.569
  },
  "oklch": {
    "l": 0.41704,
    "c": 0.16502,
    "h": 271.6
  },
  "luminance": 0.06646
}

Semantic roles & 50–950 ramp

primary

#303DA4

secondary

#BFB770

accent

#CD4ADE

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303DA4

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

Preview Lab → · Contrast checker → · Palette generator →