#3966AB#3966AB

#3966AB is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.3% C 0.121 H 258.7°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#3966AB
RGB	rgb(57, 102, 171)
HSL	hsl(216, 50%, 45%)
HSV	hsv(216, 67%, 67%)
CMYK	cmyk(66.7%, 40.4%, 0%, 32.9%)
CIE-LAB	lab(43.23, 7.41, -41.55)
CIE-LCH	lch(43.23, 42.21, 280.12°)
OKLab	oklab(51.27% -0.0236 -0.1183)
OKLCH	oklch(51.27% 0.121 258.7)
XYZ	xyz(13.7868, 13.3115, 40.3630)
Luminance	0.1331 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966AB #AB7E39

analogous

#399FAB #3966AB #4539AB

triadic

#3966AB #AB3966 #66AB39

tetradic

#3966AB #AB399F #AB7E39 #39AB45

square

#3966AB #AB399F #AB7E39 #39AB45

split-complementary

#3966AB #AB4539 #9FAB39

monochromatic

#1A2F4F #2A4B7D #3966AB #5985C8 #87A7D7

Accessibility & contrast

On white

5.73

#3966AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#3966AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966AB

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966AB	#FFFFFF	#000000	##FFFFFF
##3966AB	1.00	5.73	3.66	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#476CAE

Deuteranopia (green-blind)

#3661AA

Tritanopia (blue-blind)

#007680

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3966ab;
/* rgb */ color: rgb(57, 102, 171);
/* oklch */ color: oklch(51.3% 0.121 258.7);

Tailwind

colors: {
  custom: {
    50: '#7b91c4',
    500: '#3966ab',
    950: '#000000',
  },
}

SCSS

$custom: #3966ab;
$custom-light: #7b91c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3966ab",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 171
  },
  "hsl": {
    "h": 216.316,
    "s": 50,
    "l": 44.706
  },
  "oklch": {
    "l": 0.5127,
    "c": 0.12066,
    "h": 258.7
  },
  "luminance": 0.13313
}

Semantic roles & 50–950 ramp

primary

#3966AB

secondary

#C1A77F

accent

#A34EDA

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3966AB

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

Preview Lab → · Contrast checker → · Palette generator →