#3B66D4#3B66D4

#3B66D4 is a mid, vivid blue. Relative luminance 0.152; OKLCH L 54.2% C 0.176 H 265.0°. Best body text is #FFFFFF at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#3B66D4
RGB	rgb(59, 102, 212)
HSL	hsl(223, 64%, 53%)
HSV	hsv(223, 72%, 83%)
CMYK	cmyk(72.2%, 51.9%, 0%, 16.9%)
CIE-LAB	lab(45.89, 22.68, -61.04)
CIE-LCH	lch(45.89, 65.12, 290.38°)
OKLab	oklab(54.16% -0.0155 -0.1756)
OKLCH	oklch(54.16% 0.176 265)
XYZ	xyz(18.4345, 15.1841, 64.2339)
Luminance	0.1519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66D4 #D4A93B

analogous

#3BB3D4 #3B66D4 #5C3BD4

triadic

#3B66D4 #D43B66 #66D43B

tetradic

#3B66D4 #D43BB3 #D4A93B #3BD45C

square

#3B66D4 #D43BB3 #D4A93B #3BD45C

split-complementary

#3B66D4 #D45C3B #B3D43B

monochromatic

#1B357A #264BAC #3B66D4 #6D8DDF #9FB4EA

Accessibility & contrast

On white

5.20

#3B66D4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.04

#3B66D4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66D4

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66D4	#FFFFFF	#000000	##FFFFFF
##3B66D4	1.00	5.20	4.04	5.20
#FFFFFF	5.20	1.00	21.00	1.00
#000000	4.04	21.00	1.00	21.00
##FFFFFF	5.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C74D8

Deuteranopia (green-blind)

#0066D2

Tritanopia (blue-blind)

#008093

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3b66d4;
/* rgb */ color: rgb(59, 102, 212);
/* oklch */ color: oklch(54.2% 0.176 265.0);

Tailwind

colors: {
  custom: {
    50: '#8491e2',
    500: '#3b66d4',
    950: '#000000',
  },
}

SCSS

$custom: #3b66d4;
$custom-light: #8491e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66d4",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 212
  },
  "hsl": {
    "h": 223.137,
    "s": 64.017,
    "l": 53.137
  },
  "oklch": {
    "l": 0.54157,
    "c": 0.17627,
    "h": 265
  },
  "luminance": 0.15186
}

Semantic roles & 50–950 ramp

primary

#3B66D4

secondary

#D6C494

accent

#B841E7

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3B66D4

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

Preview Lab → · Contrast checker → · Palette generator →