#3966D3#3966D3

#3966D3 is a mid, vivid blue. Relative luminance 0.151; OKLCH L 54.0% C 0.176 H 264.4°. Best body text is #FFFFFF at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#3966D3
RGB	rgb(57, 102, 211)
HSL	hsl(222, 64%, 53%)
HSV	hsv(222, 73%, 83%)
CMYK	cmyk(73%, 51.7%, 0%, 17.3%)
CIE-LAB	lab(45.74, 22.05, -60.71)
CIE-LCH	lch(45.74, 64.60, 289.96°)
OKLab	oklab(54% -0.0172 -0.1747)
OKLCH	oklch(54% 0.176 264.4)
XYZ	xyz(18.1924, 15.0738, 63.5661)
Luminance	0.1508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966D3 #D3A639

analogous

#39B3D3 #3966D3 #5939D3

triadic

#3966D3 #D33966 #66D339

tetradic

#3966D3 #D339B3 #D3A639 #39D359

square

#3966D3 #D339B3 #D3A639 #39D359

split-complementary

#3966D3 #D35939 #B3D339

monochromatic

#1A3677 #264CA9 #3966D3 #6B8DDE #9DB3E9

Accessibility & contrast

On white

5.23

#3966D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.02

#3966D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966D3

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966D3	#FFFFFF	#000000	##FFFFFF
##3966D3	1.00	5.23	4.02	5.23
#FFFFFF	5.23	1.00	21.00	1.00
#000000	4.02	21.00	1.00	21.00
##FFFFFF	5.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E74D7

Deuteranopia (green-blind)

#0066D1

Tritanopia (blue-blind)

#008093

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3966d3;
/* rgb */ color: rgb(57, 102, 211);
/* oklch */ color: oklch(54.0% 0.176 264.4);

Tailwind

colors: {
  custom: {
    50: '#8391e1',
    500: '#3966d3',
    950: '#000000',
  },
}

SCSS

$custom: #3966d3;
$custom-light: #8391e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3966d3",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 211
  },
  "hsl": {
    "h": 222.468,
    "s": 63.636,
    "l": 52.549
  },
  "oklch": {
    "l": 0.53999,
    "c": 0.17551,
    "h": 264.4
  },
  "luminance": 0.15076
}

Semantic roles & 50–950 ramp

primary

#3966D3

secondary

#D5C292

accent

#B641E7

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3966D3

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

Preview Lab → · Contrast checker → · Palette generator →