#3966BD#3966BD

#3966BD is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.4% C 0.146 H 262.1°. Best body text is #FFFFFF at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#3966BD
RGB	rgb(57, 102, 189)
HSL	hsl(220, 54%, 48%)
HSV	hsv(220, 70%, 74%)
CMYK	cmyk(69.8%, 46%, 0%, 25.9%)
CIE-LAB	lab(44.30, 13.98, -50.36)
CIE-LCH	lch(44.30, 52.26, 285.51°)
OKLab	oklab(52.44% -0.0201 -0.1442)
OKLCH	oklch(52.44% 0.146 262.1)
XYZ	xyz(15.6208, 14.0451, 50.0220)
Luminance	0.1405 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966BD #BD9039

analogous

#39A8BD #3966BD #4E39BD

triadic

#3966BD #BD3966 #66BD39

tetradic

#3966BD #BD39A8 #BD9039 #39BD4E

square

#3966BD #BD39A8 #BD9039 #39BD4E

split-complementary

#3966BD #BD4E39 #A8BD39

monochromatic

#1D335F #2B4D8E #3966BD #6388D0 #92ACDE

Accessibility & contrast

On white

5.51

#3966BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.81

#3966BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966BD

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966BD	#FFFFFF	#000000	##FFFFFF
##3966BD	1.00	5.51	3.81	5.51
#FFFFFF	5.51	1.00	21.00	1.00
#000000	3.81	21.00	1.00	21.00
##FFFFFF	5.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6FC0

Deuteranopia (green-blind)

#1F63BB

Tritanopia (blue-blind)

#007A88

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3966bd;
/* rgb */ color: rgb(57, 102, 189);
/* oklch */ color: oklch(52.4% 0.146 262.1);

Tailwind

colors: {
  custom: {
    50: '#7f91d1',
    500: '#3966bd',
    950: '#000000',
  },
}

SCSS

$custom: #3966bd;
$custom-light: #7f91d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3966bd",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 189
  },
  "hsl": {
    "h": 219.545,
    "s": 53.659,
    "l": 48.235
  },
  "oklch": {
    "l": 0.52441,
    "c": 0.14561,
    "h": 262.1
  },
  "luminance": 0.14047
}

Semantic roles & 50–950 ramp

primary

#3966BD

secondary

#C9B389

accent

#AB4BDD

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3966BD

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

Preview Lab → · Contrast checker → · Palette generator →