#3966BA#3966BA

#3966BA is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.2% C 0.141 H 261.6°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#3966BA
RGB	rgb(57, 102, 186)
HSL	hsl(219, 53%, 48%)
HSV	hsv(219, 69%, 73%)
CMYK	cmyk(69.4%, 45.2%, 0%, 27.1%)
CIE-LAB	lab(44.11, 12.88, -48.91)
CIE-LCH	lch(44.11, 50.58, 284.75°)
OKLab	oklab(52.24% -0.0206 -0.1399)
OKLCH	oklch(52.24% 0.141 261.6)
XYZ	xyz(15.2985, 13.9162, 48.3247)
Luminance	0.1392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966BA #BA8D39

analogous

#39A6BA #3966BA #4D39BA

triadic

#3966BA #BA3966 #66BA39

tetradic

#3966BA #BA39A6 #BA8D39 #39BA4D

square

#3966BA #BA39A6 #BA8D39 #39BA4D

split-complementary

#3966BA #BA4D39 #A6BA39

monochromatic

#1C335C #2B4C8B #3966BA #6188CF #90ABDD

Accessibility & contrast

On white

5.55

#3966BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#3966BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966BA

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966BA	#FFFFFF	#000000	##FFFFFF
##3966BA	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C6FBD

Deuteranopia (green-blind)

#2463B8

Tritanopia (blue-blind)

#007A87

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3966ba;
/* rgb */ color: rgb(57, 102, 186);
/* oklch */ color: oklch(52.2% 0.141 261.6);

Tailwind

colors: {
  custom: {
    50: '#7e91cf',
    500: '#3966ba',
    950: '#000000',
  },
}

SCSS

$custom: #3966ba;
$custom-light: #7e91cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3966ba",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 186
  },
  "hsl": {
    "h": 219.07,
    "s": 53.086,
    "l": 47.647
  },
  "oklch": {
    "l": 0.52239,
    "c": 0.14146,
    "h": 261.6
  },
  "luminance": 0.13918
}

Semantic roles & 50–950 ramp

primary

#3966BA

secondary

#C8B187

accent

#AA4BDC

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3966BA

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

Preview Lab → · Contrast checker → · Palette generator →