#3947B9#3947B9

#3947B9 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.9% C 0.179 H 271.9°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#3947B9
RGB	rgb(57, 71, 185)
HSL	hsl(233, 53%, 47%)
HSV	hsv(233, 69%, 73%)
CMYK	cmyk(69.2%, 61.6%, 0%, 27.5%)
CIE-LAB	lab(35.75, 32.53, -61.86)
CIE-LCH	lch(35.75, 69.89, 297.74°)
OKLab	oklab(45.9% 0.006 -0.1785)
OKLCH	oklch(45.9% 0.179 271.9)
XYZ	xyz(12.6946, 8.8779, 46.9341)
Luminance	0.0888 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.58

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947B9 #B9AB39

analogous

#3987B9 #3947B9 #6B39B9

triadic

#3947B9 #B93947 #47B939

tetradic

#3947B9 #B93987 #B9AB39 #39B96B

square

#3947B9 #B93987 #B9AB39 #39B96B

split-complementary

#3947B9 #B96B39 #87B939

monochromatic

#1C235B #2B358A #3947B9 #616DCE #9098DD

Accessibility & contrast

On white

7.57

#3947B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#3947B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947B9

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947B9	#FFFFFF	#000000	##FFFFFF
##3947B9	1.00	7.57	2.78	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ABD

Deuteranopia (green-blind)

#004EB7

Tritanopia (blue-blind)

#006479

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3947b9;
/* rgb */ color: rgb(57, 71, 185);
/* oklch */ color: oklch(45.9% 0.179 271.9);

Tailwind

colors: {
  custom: {
    50: '#807acf',
    500: '#3947b9',
    950: '#000000',
  },
}

SCSS

$custom: #3947b9;
$custom-light: #807acf;
$custom-dark: #000000;

JSON

{
  "hex": "#3947b9",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 185
  },
  "hsl": {
    "h": 233.438,
    "s": 52.893,
    "l": 47.451
  },
  "oklch": {
    "l": 0.459,
    "c": 0.17856,
    "h": 271.9
  },
  "luminance": 0.08879
}

Semantic roles & 50–950 ramp

primary

#3947B9

secondary

#C8C086

accent

#CC4BDC

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3947B9

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

Preview Lab → · Contrast checker → · Palette generator →