#3966DA#3966DA

#3966DA is a mid, vivid blue. Relative luminance 0.154; OKLCH L 54.5% C 0.185 H 264.9°. Best body text is #FFFFFF at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#3966DA
RGB	rgb(57, 102, 218)
HSL	hsl(223, 69%, 54%)
HSV	hsv(223, 74%, 85%)
CMYK	cmyk(73.9%, 53.2%, 0%, 14.5%)
CIE-LAB	lab(46.22, 24.62, -63.92)
CIE-LCH	lch(46.22, 68.49, 291.06°)
OKLab	oklab(54.52% -0.0165 -0.1841)
OKLCH	oklch(54.52% 0.185 264.9)
XYZ	xyz(19.0891, 15.4325, 68.2888)
Luminance	0.1543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966DA #DAAD39

analogous

#39B7DA #3966DA #5D39DA

triadic

#3966DA #DA3966 #66DA39

tetradic

#3966DA #DA39B7 #DAAD39 #39DA5D

square

#3966DA #DA39B7 #DAAD39 #39DA5D

split-complementary

#3966DA #DA5D39 #B7DA39

monochromatic

#183581 #224BB4 #3966DA #6D8EE4 #A0B6ED

Accessibility & contrast

On white

5.14

#3966DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.09

#3966DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966DA

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966DA	#FFFFFF	#000000	##FFFFFF
##3966DA	1.00	5.14	4.09	5.14
#FFFFFF	5.14	1.00	21.00	1.00
#000000	4.09	21.00	1.00	21.00
##FFFFFF	5.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0875DE

Deuteranopia (green-blind)

#0066D8

Tritanopia (blue-blind)

#008296

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3966da;
/* rgb */ color: rgb(57, 102, 218);
/* oklch */ color: oklch(54.5% 0.185 264.9);

Tailwind

colors: {
  custom: {
    50: '#8591e6',
    500: '#3966da',
    950: '#000000',
  },
}

SCSS

$custom: #3966da;
$custom-light: #8591e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3966da",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 218
  },
  "hsl": {
    "h": 223.23,
    "s": 68.511,
    "l": 53.922
  },
  "oklch": {
    "l": 0.54521,
    "c": 0.18484,
    "h": 264.9
  },
  "luminance": 0.15435
}

Semantic roles & 50–950 ramp

primary

#3966DA

secondary

#DAC795

accent

#BA3CEB

background

#F8F8FE

surface

#F0F0FC

border

#CBCBD5

text

#0D0C16

muted

#7D7D84

Preview Lab

Preview with #3966DA

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

Preview Lab → · Contrast checker → · Palette generator →