#3966AD#3966AD

#3966AD is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.4% C 0.123 H 259.2°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#3966AD
RGB	rgb(57, 102, 173)
HSL	hsl(217, 50%, 45%)
HSV	hsv(217, 67%, 68%)
CMYK	cmyk(67.1%, 41%, 0%, 32.2%)
CIE-LAB	lab(43.34, 8.14, -42.55)
CIE-LCH	lch(43.34, 43.32, 280.83°)
OKLab	oklab(51.4% -0.0232 -0.1212)
OKLCH	oklch(51.4% 0.123 259.2)
XYZ	xyz(13.9788, 13.3883, 41.3746)
Luminance	0.1339 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966AD #AD8039

analogous

#39A0AD #3966AD #4639AD

triadic

#3966AD #AD3966 #66AD39

tetradic

#3966AD #AD39A0 #AD8039 #39AD46

square

#3966AD #AD39A0 #AD8039 #39AD46

split-complementary

#3966AD #AD4639 #A0AD39

monochromatic

#1B3051 #2A4B7F #3966AD #5A85C9 #88A7D8

Accessibility & contrast

On white

5.71

#3966AD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#3966AD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966AD

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966AD	#FFFFFF	#000000	##FFFFFF
##3966AD	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#466CB0

Deuteranopia (green-blind)

#3461AC

Tritanopia (blue-blind)

#007681

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3966ad;
/* rgb */ color: rgb(57, 102, 173);
/* oklch */ color: oklch(51.4% 0.123 259.2);

Tailwind

colors: {
  custom: {
    50: '#7c91c6',
    500: '#3966ad',
    950: '#000000',
  },
}

SCSS

$custom: #3966ad;
$custom-light: #7c91c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3966ad",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 173
  },
  "hsl": {
    "h": 216.724,
    "s": 50.435,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51395,
    "c": 0.12345,
    "h": 259.2
  },
  "luminance": 0.1339
}

Semantic roles & 50–950 ramp

primary

#3966AD

secondary

#C2A880

accent

#A44EDA

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3966AD

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

Preview Lab → · Contrast checker → · Palette generator →