#3B66D9#3B66D9

#3B66D9 is a mid, vivid blue. Relative luminance 0.154; OKLCH L 54.5% C 0.183 H 265.3°. Best body text is #FFFFFF at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#3B66D9
RGB	rgb(59, 102, 217)
HSL	hsl(224, 68%, 54%)
HSV	hsv(224, 73%, 85%)
CMYK	cmyk(72.8%, 53%, 0%, 14.9%)
CIE-LAB	lab(46.23, 24.50, -63.33)
CIE-LCH	lch(46.23, 67.90, 291.15°)
OKLab	oklab(54.53% -0.015 -0.1823)
OKLCH	oklch(54.53% 0.183 265.3)
XYZ	xyz(19.0750, 15.4403, 67.6072)
Luminance	0.1544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66D9 #D9AE3B

analogous

#3BB5D9 #3B66D9 #5F3BD9

triadic

#3B66D9 #D93B66 #66D93B

tetradic

#3B66D9 #D93BB5 #D9AE3B #3BD95F

square

#3B66D9 #D93BB5 #D9AE3B #3BD95F

split-complementary

#3B66D9 #D95F3B #B5D93B

monochromatic

#193581 #234AB4 #3B66D9 #6E8EE3 #A2B6ED

Accessibility & contrast

On white

5.14

#3B66D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.09

#3B66D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66D9

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66D9	#FFFFFF	#000000	##FFFFFF
##3B66D9	1.00	5.14	4.09	5.14
#FFFFFF	5.14	1.00	21.00	1.00
#000000	4.09	21.00	1.00	21.00
##FFFFFF	5.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E75DD

Deuteranopia (green-blind)

#0067D7

Tritanopia (blue-blind)

#008296

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3b66d9;
/* rgb */ color: rgb(59, 102, 217);
/* oklch */ color: oklch(54.5% 0.183 265.3);

Tailwind

colors: {
  custom: {
    50: '#8591e5',
    500: '#3b66d9',
    950: '#000000',
  },
}

SCSS

$custom: #3b66d9;
$custom-light: #8591e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66d9",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 217
  },
  "hsl": {
    "h": 223.671,
    "s": 67.521,
    "l": 54.118
  },
  "oklch": {
    "l": 0.54529,
    "c": 0.18295,
    "h": 265.3
  },
  "luminance": 0.15442
}

Semantic roles & 50–950 ramp

primary

#3B66D9

secondary

#DAC796

accent

#BB3DEA

background

#F8F8FE

surface

#F0F0FC

border

#CBCBD5

text

#0D0C16

muted

#7D7D84

Preview Lab

Preview with #3B66D9

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

Preview Lab → · Contrast checker → · Palette generator →