#3966E9#3966E9

#3966E9 is a mid, highly saturated blue. Relative luminance 0.163; OKLCH L 55.7% C 0.204 H 265.6°. Best body text is #FFFFFF at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#3966E9
RGB	rgb(57, 102, 233)
HSL	hsl(225, 80%, 57%)
HSV	hsv(225, 76%, 91%)
CMYK	cmyk(75.5%, 56.2%, 0%, 8.6%)
CIE-LAB	lab(47.31, 30.08, -70.64)
CIE-LCH	lch(47.31, 76.78, 293.07°)
OKLab	oklab(55.68% -0.0156 -0.2039)
OKLCH	oklch(55.68% 0.204 265.6)
XYZ	xyz(21.1415, 16.2534, 79.0980)
Luminance	0.1626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966E9 #E9BC39

analogous

#39BEE9 #3966E9 #6439E9

triadic

#3966E9 #E93966 #66E939

tetradic

#3966E9 #E939BE #E9BC39 #39E964

square

#3966E9 #E939BE #E9BC39 #39E964

split-complementary

#3966E9 #E96439 #BEE939

monochromatic

#113397 #1746CE #3966E9 #7091EF #A7BBF5

Accessibility & contrast

On white

4.94

#3966E9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.25

#3966E9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966E9

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966E9	#FFFFFF	#000000	##FFFFFF
##3966E9	1.00	4.94	4.25	4.94
#FFFFFF	4.94	1.00	21.00	1.00
#000000	4.25	21.00	1.00	21.00
##FFFFFF	4.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0079ED

Deuteranopia (green-blind)

#0068E6

Tritanopia (blue-blind)

#00879E

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3966e9;
/* rgb */ color: rgb(57, 102, 233);
/* oklch */ color: oklch(55.7% 0.204 265.6);

Tailwind

colors: {
  custom: {
    50: '#8891f1',
    500: '#3966e9',
    950: '#000000',
  },
}

SCSS

$custom: #3966e9;
$custom-light: #8891f1;
$custom-dark: #000000;

JSON

{
  "hex": "#3966e9",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 233
  },
  "hsl": {
    "h": 224.659,
    "s": 80,
    "l": 56.863
  },
  "oklch": {
    "l": 0.55681,
    "c": 0.20446,
    "h": 265.6
  },
  "luminance": 0.16256
}

Semantic roles & 50–950 ramp

primary

#3966E9

secondary

#E3D09B

accent

#C431F6

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C17

muted

#7E7D85

Preview Lab

Preview with #3966E9

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

Preview Lab → · Contrast checker → · Palette generator →