#303DA1#303DA1

#303DA1 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.4% C 0.161 H 271.7°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#303DA1
RGB	rgb(48, 61, 161)
HSL	hsl(233, 54%, 41%)
HSV	hsv(233, 70%, 63%)
CMYK	cmyk(70.2%, 62.1%, 0%, 36.9%)
CIE-LAB	lab(30.73, 29.12, -55.75)
CIE-LCH	lch(30.73, 62.90, 297.58°)
OKLab	oklab(41.44% 0.0048 -0.1608)
OKLCH	oklch(41.44% 0.161 271.7)
XYZ	xyz(9.3185, 6.5382, 34.4822)
Luminance	0.0654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303DA1 #A19430

analogous

#3075A1 #303DA1 #5B30A1

triadic

#303DA1 #A1303D #3DA130

tetradic

#303DA1 #A13075 #A19430 #30A15B

square

#303DA1 #A13075 #A19430 #30A15B

split-complementary

#303DA1 #A15B30 #75A130

monochromatic

#141943 #222B72 #303DA1 #4655C8 #7581D6

Accessibility & contrast

On white

9.10

#303DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#303DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DA1

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DA1	#FFFFFF	#000000	##FFFFFF
##303DA1	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00439F

Tritanopia (blue-blind)

#005669

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #303da1;
/* rgb */ color: rgb(48, 61, 161);
/* oklch */ color: oklch(41.4% 0.161 271.7);

Tailwind

colors: {
  custom: {
    50: '#7872be',
    500: '#303da1',
    950: '#000000',
  },
}

SCSS

$custom: #303da1;
$custom-light: #7872be;
$custom-dark: #000000;

JSON

{
  "hex": "#303da1",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 161
  },
  "hsl": {
    "h": 233.097,
    "s": 54.067,
    "l": 40.98
  },
  "oklch": {
    "l": 0.41438,
    "c": 0.16092,
    "h": 271.7
  },
  "luminance": 0.06539
}

Semantic roles & 50–950 ramp

primary

#303DA1

secondary

#BEB56F

accent

#CD4ADD

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303DA1

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

Preview Lab → · Contrast checker → · Palette generator →