#3966BF#3966BF

#3966BF is a mid, vivid blue. Relative luminance 0.141; OKLCH L 52.6% C 0.148 H 262.3°. Best body text is #FFFFFF at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#3966BF
RGB	rgb(57, 102, 191)
HSL	hsl(220, 54%, 49%)
HSV	hsv(220, 70%, 75%)
CMYK	cmyk(70.2%, 46.6%, 0%, 25.1%)
CIE-LAB	lab(44.42, 14.71, -51.32)
CIE-LCH	lch(44.42, 53.39, 285.99°)
OKLab	oklab(52.58% -0.0198 -0.147)
OKLCH	oklch(52.58% 0.148 262.3)
XYZ	xyz(15.8393, 14.1325, 51.1732)
Luminance	0.1413 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966BF #BF9239

analogous

#39A9BF #3966BF #4F39BF

triadic

#3966BF #BF3966 #66BF39

tetradic

#3966BF #BF39A9 #BF9239 #39BF4F

square

#3966BF #BF39A9 #BF9239 #39BF4F

split-complementary

#3966BF #BF4F39 #A9BF39

monochromatic

#1D3461 #2B4D90 #3966BF #6489D1 #93ADDF

Accessibility & contrast

On white

5.49

#3966BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#3966BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966BF

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966BF	#FFFFFF	#000000	##FFFFFF
##3966BF	1.00	5.49	3.83	5.49
#FFFFFF	5.49	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3870C2

Deuteranopia (green-blind)

#1A63BD

Tritanopia (blue-blind)

#007B89

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3966bf;
/* rgb */ color: rgb(57, 102, 191);
/* oklch */ color: oklch(52.6% 0.148 262.3);

Tailwind

colors: {
  custom: {
    50: '#7f91d3',
    500: '#3966bf',
    950: '#000000',
  },
}

SCSS

$custom: #3966bf;
$custom-light: #7f91d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3966bf",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 191
  },
  "hsl": {
    "h": 219.851,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.52577,
    "c": 0.14836,
    "h": 262.3
  },
  "luminance": 0.14134
}

Semantic roles & 50–950 ramp

primary

#3966BF

secondary

#CAB48A

accent

#AC4ADD

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3966BF

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

Preview Lab → · Contrast checker → · Palette generator →