#3966D5#3966D5

#3966D5 is a mid, vivid blue. Relative luminance 0.152; OKLCH L 54.1% C 0.178 H 264.5°. Best body text is #FFFFFF at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#3966D5
RGB	rgb(57, 102, 213)
HSL	hsl(223, 65%, 53%)
HSV	hsv(223, 73%, 84%)
CMYK	cmyk(73.2%, 52.1%, 0%, 16.5%)
CIE-LAB	lab(45.87, 22.79, -61.63)
CIE-LCH	lch(45.87, 65.71, 290.29°)
OKLab	oklab(54.15% -0.017 -0.1774)
OKLCH	oklch(54.15% 0.178 264.5)
XYZ	xyz(18.4447, 15.1747, 64.8948)
Luminance	0.1518 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966D5 #D5A839

analogous

#39B4D5 #3966D5 #5A39D5

triadic

#3966D5 #D53966 #66D539

tetradic

#3966D5 #D539B4 #D5A839 #39D55A

square

#3966D5 #D539B4 #D5A839 #39D55A

split-complementary

#3966D5 #D55A39 #B4D539

monochromatic

#1A367A #254CAC #3966D5 #6B8DE0 #9EB4EA

Accessibility & contrast

On white

5.20

#3966D5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.04

#3966D5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966D5

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966D5	#FFFFFF	#000000	##FFFFFF
##3966D5	1.00	5.20	4.04	5.20
#FFFFFF	5.20	1.00	21.00	1.00
#000000	4.04	21.00	1.00	21.00
##FFFFFF	5.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1974D9

Deuteranopia (green-blind)

#0066D3

Tritanopia (blue-blind)

#008194

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3966d5;
/* rgb */ color: rgb(57, 102, 213);
/* oklch */ color: oklch(54.1% 0.178 264.5);

Tailwind

colors: {
  custom: {
    50: '#8491e3',
    500: '#3966d5',
    950: '#000000',
  },
}

SCSS

$custom: #3966d5;
$custom-light: #8491e3;
$custom-dark: #000000;

JSON

{
  "hex": "#3966d5",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 213
  },
  "hsl": {
    "h": 222.692,
    "s": 65,
    "l": 52.941
  },
  "oklch": {
    "l": 0.54147,
    "c": 0.17819,
    "h": 264.5
  },
  "luminance": 0.15177
}

Semantic roles & 50–950 ramp

primary

#3966D5

secondary

#D7C393

accent

#B740E8

background

#F8F8FE

surface

#F0F0FC

border

#CBCBD5

text

#0C0C15

muted

#7D7D84

Preview Lab

Preview with #3966D5

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

Preview Lab → · Contrast checker → · Palette generator →