#303DA3#303DA3

#303DA3 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.6% C 0.164 H 271.6°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#303DA3
RGB	rgb(48, 61, 163)
HSL	hsl(233, 55%, 41%)
HSV	hsv(233, 71%, 64%)
CMYK	cmyk(70.6%, 62.6%, 0%, 36.1%)
CIE-LAB	lab(30.90, 29.85, -56.69)
CIE-LCH	lch(30.90, 64.07, 297.77°)
OKLab	oklab(41.62% 0.0047 -0.1636)
OKLCH	oklch(41.62% 0.164 271.6)
XYZ	xyz(9.4963, 6.6093, 35.4185)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303DA3 #A39630

analogous

#3077A3 #303DA3 #5D30A3

triadic

#303DA3 #A3303D #3DA330

tetradic

#303DA3 #A33077 #A39630 #30A35D

square

#303DA3 #A33077 #A39630 #30A35D

split-complementary

#303DA3 #A35D30 #77A330

monochromatic

#141A44 #222B74 #303DA3 #4756C9 #7781D7

Accessibility & contrast

On white

9.04

#303DA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#303DA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303DA3

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303DA3	#FFFFFF	#000000	##FFFFFF
##303DA3	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA6

Deuteranopia (green-blind)

#0044A1

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #303da3;
/* rgb */ color: rgb(48, 61, 163);
/* oklch */ color: oklch(41.6% 0.164 271.6);

Tailwind

colors: {
  custom: {
    50: '#7872bf',
    500: '#303da3',
    950: '#000000',
  },
}

SCSS

$custom: #303da3;
$custom-light: #7872bf;
$custom-dark: #000000;

JSON

{
  "hex": "#303da3",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 163
  },
  "hsl": {
    "h": 233.217,
    "s": 54.502,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41615,
    "c": 0.16366,
    "h": 271.6
  },
  "luminance": 0.0661
}

Semantic roles & 50–950 ramp

primary

#303DA3

secondary

#BFB670

accent

#CD4ADE

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303DA3

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

Preview Lab → · Contrast checker → · Palette generator →