#3966C8#3966C8

#3966C8 is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.2% C 0.161 H 263.4°. Best body text is #FFFFFF at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#3966C8
RGB	rgb(57, 102, 200)
HSL	hsl(221, 57%, 50%)
HSV	hsv(221, 72%, 78%)
CMYK	cmyk(71.5%, 49%, 0%, 21.6%)
CIE-LAB	lab(45.00, 18.01, -55.59)
CIE-LCH	lch(45.00, 58.44, 287.95°)
OKLab	oklab(53.2% -0.0185 -0.1596)
OKLCH	oklch(53.2% 0.161 263.4)
XYZ	xyz(16.8603, 14.5409, 56.5505)
Luminance	0.1454 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966C8 #C89B39

analogous

#39ADC8 #3966C8 #5339C8

triadic

#3966C8 #C83966 #66C839

tetradic

#3966C8 #C839AD #C89B39 #39C853

square

#3966C8 #C839AD #C89B39 #39C853

split-complementary

#3966C8 #C85339 #ADC839

monochromatic

#1D3569 #2B4D99 #3966C8 #698BD5 #99B0E3

Accessibility & contrast

On white

5.37

#3966C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#3966C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966C8

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966C8	#FFFFFF	#000000	##FFFFFF
##3966C8	1.00	5.37	3.91	5.37
#FFFFFF	5.37	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E71CC

Deuteranopia (green-blind)

#0064C6

Tritanopia (blue-blind)

#007D8D

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3966c8;
/* rgb */ color: rgb(57, 102, 200);
/* oklch */ color: oklch(53.2% 0.161 263.4);

Tailwind

colors: {
  custom: {
    50: '#8191d9',
    500: '#3966c8',
    950: '#000000',
  },
}

SCSS

$custom: #3966c8;
$custom-light: #8191d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3966c8",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 200
  },
  "hsl": {
    "h": 221.119,
    "s": 56.522,
    "l": 50.392
  },
  "oklch": {
    "l": 0.53203,
    "c": 0.16067,
    "h": 263.4
  },
  "luminance": 0.14543
}

Semantic roles & 50–950 ramp

primary

#3966C8

secondary

#CEBA8F

accent

#B048E0

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3966C8

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

Preview Lab → · Contrast checker → · Palette generator →