#3966D4#3966D4

#3966D4 is a mid, vivid blue. Relative luminance 0.151; OKLCH L 54.1% C 0.177 H 264.5°. Best body text is #FFFFFF at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#3966D4
RGB	rgb(57, 102, 212)
HSL	hsl(223, 64%, 53%)
HSV	hsv(223, 73%, 83%)
CMYK	cmyk(73.1%, 51.9%, 0%, 16.9%)
CIE-LAB	lab(45.80, 22.42, -61.18)
CIE-LCH	lch(45.80, 65.15, 290.13°)
OKLab	oklab(54.07% -0.0171 -0.176)
OKLCH	oklch(54.07% 0.177 264.5)
XYZ	xyz(18.3182, 15.1241, 64.2284)
Luminance	0.1513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966D4 #D4A739

analogous

#39B3D4 #3966D4 #5A39D4

triadic

#3966D4 #D43966 #66D439

tetradic

#3966D4 #D439B3 #D4A739 #39D45A

square

#3966D4 #D439B3 #D4A739 #39D45A

split-complementary

#3966D4 #D45A39 #B3D439

monochromatic

#1A3678 #254CAB #3966D4 #6B8DDF #9EB4EA

Accessibility & contrast

On white

5.22

#3966D4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.03

#3966D4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966D4

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966D4	#FFFFFF	#000000	##FFFFFF
##3966D4	1.00	5.22	4.03	5.22
#FFFFFF	5.22	1.00	21.00	1.00
#000000	4.03	21.00	1.00	21.00
##FFFFFF	5.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B74D8

Deuteranopia (green-blind)

#0066D2

Tritanopia (blue-blind)

#008093

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3966d4;
/* rgb */ color: rgb(57, 102, 212);
/* oklch */ color: oklch(54.1% 0.177 264.5);

Tailwind

colors: {
  custom: {
    50: '#8391e2',
    500: '#3966d4',
    950: '#000000',
  },
}

SCSS

$custom: #3966d4;
$custom-light: #8391e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3966d4",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 212
  },
  "hsl": {
    "h": 222.581,
    "s": 64.315,
    "l": 52.745
  },
  "oklch": {
    "l": 0.54073,
    "c": 0.17686,
    "h": 264.5
  },
  "luminance": 0.15126
}

Semantic roles & 50–950 ramp

primary

#3966D4

secondary

#D6C293

accent

#B740E7

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3966D4

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

Preview Lab → · Contrast checker → · Palette generator →