#3947B5#3947B5

#3947B5 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.6% C 0.173 H 272.0°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).

Color values

HEX	#3947B5
RGB	rgb(57, 71, 181)
HSL	hsl(233, 52%, 47%)
HSV	hsv(233, 69%, 71%)
CMYK	cmyk(68.5%, 60.8%, 0%, 29%)
CIE-LAB	lab(35.42, 31.11, -60.03)
CIE-LCH	lch(35.42, 67.61, 297.39°)
OKLab	oklab(45.56% 0.0061 -0.1731)
OKLCH	oklch(45.56% 0.173 272)
XYZ	xyz(12.2783, 8.7114, 44.7415)
Luminance	0.0871 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947B5 #B5A739

analogous

#3985B5 #3947B5 #6939B5

triadic

#3947B5 #B53947 #47B539

tetradic

#3947B5 #B53985 #B5A739 #39B569

square

#3947B5 #B53985 #B5A739 #39B569

split-complementary

#3947B5 #B56939 #85B539

monochromatic

#1C2258 #2A3586 #3947B5 #5F6BCD #8D96DB

Accessibility & contrast

On white

7.66

#3947B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#3947B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947B5

7.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947B5	#FFFFFF	#000000	##FFFFFF
##3947B5	1.00	7.66	2.74	7.66
#FFFFFF	7.66	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B9

Deuteranopia (green-blind)

#004EB3

Tritanopia (blue-blind)

#006377

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3947b5;
/* rgb */ color: rgb(57, 71, 181);
/* oklch */ color: oklch(45.6% 0.173 272.0);

Tailwind

colors: {
  custom: {
    50: '#7f7acc',
    500: '#3947b5',
    950: '#000000',
  },
}

SCSS

$custom: #3947b5;
$custom-light: #7f7acc;
$custom-dark: #000000;

JSON

{
  "hex": "#3947b5",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 181
  },
  "hsl": {
    "h": 233.226,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.45558,
    "c": 0.1732,
    "h": 272
  },
  "luminance": 0.08713
}

Semantic roles & 50–950 ramp

primary

#3947B5

secondary

#C6BE84

accent

#CB4CDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3947B5

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

Preview Lab → · Contrast checker → · Palette generator →