#3966D8#3966D8

#3966D8 is a mid, vivid blue. Relative luminance 0.153; OKLCH L 54.4% C 0.182 H 264.7°. Best body text is #FFFFFF at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#3966D8
RGB	rgb(57, 102, 216)
HSL	hsl(223, 67%, 54%)
HSV	hsv(223, 74%, 85%)
CMYK	cmyk(73.6%, 52.8%, 0%, 15.3%)
CIE-LAB	lab(46.08, 23.88, -63.01)
CIE-LCH	lch(46.08, 67.38, 290.76°)
OKLab	oklab(54.37% -0.0167 -0.1814)
OKLCH	oklch(54.37% 0.182 264.7)
XYZ	xyz(18.8290, 15.3284, 66.9188)
Luminance	0.1533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966D8 #D8AB39

analogous

#39B5D8 #3966D8 #5B39D8

triadic

#3966D8 #D83966 #66D839

tetradic

#3966D8 #D839B5 #D8AB39 #39D85B

square

#3966D8 #D839B5 #D8AB39 #39D85B

split-complementary

#3966D8 #D85B39 #B5D839

monochromatic

#19357E #234BB1 #3966D8 #6C8EE2 #9FB5EC

Accessibility & contrast

On white

5.16

#3966D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.07

#3966D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966D8

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966D8	#FFFFFF	#000000	##FFFFFF
##3966D8	1.00	5.16	4.07	5.16
#FFFFFF	5.16	1.00	21.00	1.00
#000000	4.07	21.00	1.00	21.00
##FFFFFF	5.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1175DC

Deuteranopia (green-blind)

#0066D6

Tritanopia (blue-blind)

#008295

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3966d8;
/* rgb */ color: rgb(57, 102, 216);
/* oklch */ color: oklch(54.4% 0.182 264.7);

Tailwind

colors: {
  custom: {
    50: '#8491e5',
    500: '#3966d8',
    950: '#000000',
  },
}

SCSS

$custom: #3966d8;
$custom-light: #8491e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3966d8",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 216
  },
  "hsl": {
    "h": 223.019,
    "s": 67.089,
    "l": 53.529
  },
  "oklch": {
    "l": 0.54371,
    "c": 0.18219,
    "h": 264.7
  },
  "luminance": 0.1533
}

Semantic roles & 50–950 ramp

primary

#3966D8

secondary

#D8C594

accent

#B93EEA

background

#F8F8FE

surface

#F0F0FC

border

#CBCBD5

text

#0C0C16

muted

#7D7D84

Preview Lab

Preview with #3966D8

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

Preview Lab → · Contrast checker → · Palette generator →