#3966BC#3966BC

#3966BC is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.4% C 0.144 H 261.9°. Best body text is #FFFFFF at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#3966BC
RGB	rgb(57, 102, 188)
HSL	hsl(219, 53%, 48%)
HSV	hsv(219, 70%, 74%)
CMYK	cmyk(69.7%, 45.7%, 0%, 26.3%)
CIE-LAB	lab(44.24, 13.61, -49.88)
CIE-LCH	lch(44.24, 51.70, 285.26°)
OKLab	oklab(52.37% -0.0203 -0.1428)
OKLCH	oklch(52.37% 0.144 261.9)
XYZ	xyz(15.5126, 14.0018, 49.4523)
Luminance	0.1400 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966BC #BC8F39

analogous

#39A7BC #3966BC #4D39BC

triadic

#3966BC #BC3966 #66BC39

tetradic

#3966BC #BC39A7 #BC8F39 #39BC4D

square

#3966BC #BC39A7 #BC8F39 #39BC4D

split-complementary

#3966BC #BC4D39 #A7BC39

monochromatic

#1D335E #2B4D8D #3966BC #6388D0 #92ACDE

Accessibility & contrast

On white

5.53

#3966BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#3966BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966BC

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966BC	#FFFFFF	#000000	##FFFFFF
##3966BC	1.00	5.53	3.80	5.53
#FFFFFF	5.53	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B6FBF

Deuteranopia (green-blind)

#2063BA

Tritanopia (blue-blind)

#007A88

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3966bc;
/* rgb */ color: rgb(57, 102, 188);
/* oklch */ color: oklch(52.4% 0.144 261.9);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#3966bc",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 188
  },
  "hsl": {
    "h": 219.389,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.52373,
    "c": 0.14422,
    "h": 261.9
  },
  "luminance": 0.14003
}

Semantic roles & 50–950 ramp

primary

#3966BC

secondary

#C9B388

accent

#AB4BDD

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3966BC

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

Preview Lab → · Contrast checker → · Palette generator →