#3966C5#3966C5

#3966C5 is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.0% C 0.157 H 263.1°. Best body text is #FFFFFF at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#3966C5
RGB	rgb(57, 102, 197)
HSL	hsl(221, 55%, 50%)
HSV	hsv(221, 71%, 77%)
CMYK	cmyk(71.1%, 48.2%, 0%, 22.7%)
CIE-LAB	lab(44.80, 16.91, -54.18)
CIE-LCH	lch(44.80, 56.76, 287.34°)
OKLab	oklab(52.99% -0.0189 -0.1554)
OKLCH	oklch(52.99% 0.157 263.1)
XYZ	xyz(16.5132, 14.4021, 54.7221)
Luminance	0.1440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966C5 #C59839

analogous

#39ACC5 #3966C5 #5239C5

triadic

#3966C5 #C53966 #66C539

tetradic

#3966C5 #C539AC #C59839 #39C552

square

#3966C5 #C539AC #C59839 #39C552

split-complementary

#3966C5 #C55239 #ACC539

monochromatic

#1E3566 #2B4D96 #3966C5 #688AD3 #97AFE1

Accessibility & contrast

On white

5.41

#3966C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.88

#3966C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966C5

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966C5	#FFFFFF	#000000	##FFFFFF
##3966C5	1.00	5.41	3.88	5.41
#FFFFFF	5.41	1.00	21.00	1.00
#000000	3.88	21.00	1.00	21.00
##FFFFFF	5.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3271C8

Deuteranopia (green-blind)

#0764C3

Tritanopia (blue-blind)

#007C8C

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3966c5;
/* rgb */ color: rgb(57, 102, 197);
/* oklch */ color: oklch(53.0% 0.157 263.1);

Tailwind

colors: {
  custom: {
    50: '#8091d7',
    500: '#3966c5',
    950: '#000000',
  },
}

SCSS

$custom: #3966c5;
$custom-light: #8091d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3966c5",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 197
  },
  "hsl": {
    "h": 220.714,
    "s": 55.118,
    "l": 49.804
  },
  "oklch": {
    "l": 0.52992,
    "c": 0.15657,
    "h": 263.1
  },
  "luminance": 0.14404
}

Semantic roles & 50–950 ramp

primary

#3966C5

secondary

#CDB88D

accent

#AF49DE

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0C0C14

muted

#7D7D83

Preview Lab

Preview with #3966C5

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

Preview Lab → · Contrast checker → · Palette generator →