#3966C7#3966C7

#3966C7 is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.1% C 0.159 H 263.3°. Best body text is #FFFFFF at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#3966C7
RGB	rgb(57, 102, 199)
HSL	hsl(221, 56%, 50%)
HSV	hsv(221, 71%, 78%)
CMYK	cmyk(71.4%, 48.7%, 0%, 22%)
CIE-LAB	lab(44.93, 17.65, -55.12)
CIE-LCH	lch(44.93, 57.88, 287.75°)
OKLab	oklab(53.13% -0.0186 -0.1582)
OKLCH	oklch(53.13% 0.159 263.3)
XYZ	xyz(16.7439, 14.4944, 55.9370)
Luminance	0.1450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966C7 #C79A39

analogous

#39ADC7 #3966C7 #5339C7

triadic

#3966C7 #C73966 #66C739

tetradic

#3966C7 #C739AD #C79A39 #39C753

square

#3966C7 #C739AD #C79A39 #39C753

split-complementary

#3966C7 #C75339 #ADC739

monochromatic

#1D3568 #2B4D98 #3966C7 #698BD4 #98B0E2

Accessibility & contrast

On white

5.39

#3966C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#3966C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966C7

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966C7	#FFFFFF	#000000	##FFFFFF
##3966C7	1.00	5.39	3.90	5.39
#FFFFFF	5.39	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3071CB

Deuteranopia (green-blind)

#0064C5

Tritanopia (blue-blind)

#007D8D

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3966c7;
/* rgb */ color: rgb(57, 102, 199);
/* oklch */ color: oklch(53.1% 0.159 263.3);

Tailwind

colors: {
  custom: {
    50: '#8191d9',
    500: '#3966c7',
    950: '#000000',
  },
}

SCSS

$custom: #3966c7;
$custom-light: #8191d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3966c7",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 199
  },
  "hsl": {
    "h": 220.986,
    "s": 55.906,
    "l": 50.196
  },
  "oklch": {
    "l": 0.53133,
    "c": 0.1593,
    "h": 263.3
  },
  "luminance": 0.14496
}

Semantic roles & 50–950 ramp

primary

#3966C7

secondary

#CEBA8E

accent

#AF49DF

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3966C7

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

Preview Lab → · Contrast checker → · Palette generator →