#3966AC#3966AC

#3966AC is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.3% C 0.122 H 258.9°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#3966AC
RGB	rgb(57, 102, 172)
HSL	hsl(217, 50%, 45%)
HSV	hsv(217, 67%, 67%)
CMYK	cmyk(66.9%, 40.7%, 0%, 32.5%)
CIE-LAB	lab(43.29, 7.78, -42.05)
CIE-LCH	lch(43.29, 42.76, 280.48°)
OKLab	oklab(51.33% -0.0234 -0.1198)
OKLCH	oklch(51.33% 0.122 258.9)
XYZ	xyz(13.8824, 13.3498, 40.8669)
Luminance	0.1335 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966AC #AC7F39

analogous

#399FAC #3966AC #4639AC

triadic

#3966AC #AC3966 #66AC39

tetradic

#3966AC #AC399F #AC7F39 #39AC46

square

#3966AC #AC399F #AC7F39 #39AC46

split-complementary

#3966AC #AC4639 #9FAC39

monochromatic

#1B2F50 #2A4B7E #3966AC #5A85C8 #88A7D8

Accessibility & contrast

On white

5.72

#3966AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#3966AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966AC

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966AC	#FFFFFF	#000000	##FFFFFF
##3966AC	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#466CAF

Deuteranopia (green-blind)

#3561AB

Tritanopia (blue-blind)

#007680

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3966ac;
/* rgb */ color: rgb(57, 102, 172);
/* oklch */ color: oklch(51.3% 0.122 258.9);

Tailwind

colors: {
  custom: {
    50: '#7c91c5',
    500: '#3966ac',
    950: '#000000',
  },
}

SCSS

$custom: #3966ac;
$custom-light: #7c91c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3966ac",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 172
  },
  "hsl": {
    "h": 216.522,
    "s": 50.218,
    "l": 44.902
  },
  "oklch": {
    "l": 0.51332,
    "c": 0.12205,
    "h": 258.9
  },
  "luminance": 0.13351
}

Semantic roles & 50–950 ramp

primary

#3966AC

secondary

#C2A87F

accent

#A34EDA

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3966AC

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

Preview Lab → · Contrast checker → · Palette generator →