#3966CC#3966CC

#3966CC is a mid, vivid blue. Relative luminance 0.147; OKLCH L 53.5% C 0.166 H 263.8°. Best body text is #FFFFFF at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#3966CC
RGB	rgb(57, 102, 204)
HSL	hsl(222, 59%, 51%)
HSV	hsv(222, 72%, 80%)
CMYK	cmyk(72.1%, 50%, 0%, 20%)
CIE-LAB	lab(45.26, 19.48, -57.47)
CIE-LCH	lch(45.26, 60.68, 288.73°)
OKLab	oklab(53.49% -0.018 -0.1651)
OKLCH	oklch(53.49% 0.166 263.8)
XYZ	xyz(17.3339, 14.7304, 59.0447)
Luminance	0.1473 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966CC #CC9F39

analogous

#39AFCC #3966CC #5539CC

triadic

#3966CC #CC3966 #66CC39

tetradic

#3966CC #CC39AF #CC9F39 #39CC55

square

#3966CC #CC39AF #CC9F39 #39CC55

split-complementary

#3966CC #CC5539 #AFCC39

monochromatic

#1C356E #294D9F #3966CC #6A8CD9 #9AB1E5

Accessibility & contrast

On white

5.32

#3966CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.95

#3966CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966CC

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966CC	#FFFFFF	#000000	##FFFFFF
##3966CC	1.00	5.32	3.95	5.32
#FFFFFF	5.32	1.00	21.00	1.00
#000000	3.95	21.00	1.00	21.00
##FFFFFF	5.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2972D0

Deuteranopia (green-blind)

#0065CA

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3966cc;
/* rgb */ color: rgb(57, 102, 204);
/* oklch */ color: oklch(53.5% 0.166 263.8);

Tailwind

colors: {
  custom: {
    50: '#8291dc',
    500: '#3966cc',
    950: '#000000',
  },
}

SCSS

$custom: #3966cc;
$custom-light: #8291dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3966cc",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 221.633,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.53489,
    "c": 0.16609,
    "h": 263.8
  },
  "luminance": 0.14732
}

Semantic roles & 50–950 ramp

primary

#3966CC

secondary

#D1BD90

accent

#B246E2

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3966CC

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

Preview Lab → · Contrast checker → · Palette generator →