#3947B8#3947B8

#3947B8 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.8% C 0.177 H 272.0°. Best body text is #FFFFFF at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#3947B8
RGB	rgb(57, 71, 184)
HSL	hsl(233, 53%, 47%)
HSV	hsv(233, 69%, 72%)
CMYK	cmyk(69%, 61.4%, 0%, 27.8%)
CIE-LAB	lab(35.67, 32.17, -61.40)
CIE-LCH	lch(35.67, 69.32, 297.65°)
OKLab	oklab(45.81% 0.0061 -0.1771)
OKLCH	oklch(45.81% 0.177 272)
XYZ	xyz(12.5894, 8.8358, 46.3801)
Luminance	0.0884 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.66

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947B8 #B8AA39

analogous

#3986B8 #3947B8 #6B39B8

triadic

#3947B8 #B83947 #47B839

tetradic

#3947B8 #B83986 #B8AA39 #39B86B

square

#3947B8 #B83986 #B8AA39 #39B86B

split-complementary

#3947B8 #B86B39 #86B839

monochromatic

#1C235B #2B3589 #3947B8 #606CCE #8F98DC

Accessibility & contrast

On white

7.59

#3947B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#3947B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947B8

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947B8	#FFFFFF	#000000	##FFFFFF
##3947B8	1.00	7.59	2.77	7.59
#FFFFFF	7.59	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ABC

Deuteranopia (green-blind)

#004EB6

Tritanopia (blue-blind)

#006478

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3947b8;
/* rgb */ color: rgb(57, 71, 184);
/* oklch */ color: oklch(45.8% 0.177 272.0);

Tailwind

colors: {
  custom: {
    50: '#807ace',
    500: '#3947b8',
    950: '#000000',
  },
}

SCSS

$custom: #3947b8;
$custom-light: #807ace;
$custom-dark: #000000;

JSON

{
  "hex": "#3947b8",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 184
  },
  "hsl": {
    "h": 233.386,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.45814,
    "c": 0.17722,
    "h": 272
  },
  "luminance": 0.08837
}

Semantic roles & 50–950 ramp

primary

#3947B8

secondary

#C7C086

accent

#CC4CDC

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3947B8

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

Preview Lab → · Contrast checker → · Palette generator →