#3F66AE#3F66AE

#3F66AE is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.7% C 0.123 H 261.6°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F66AE
RGB	rgb(63, 102, 174)
HSL	hsl(219, 47%, 46%)
HSV	hsv(219, 64%, 68%)
CMYK	cmyk(63.8%, 41.4%, 0%, 31.8%)
CIE-LAB	lab(43.67, 9.57, -42.59)
CIE-LCH	lch(43.67, 43.65, 282.66°)
OKLab	oklab(51.75% -0.0178 -0.1213)
OKLCH	oklch(51.75% 0.123 261.6)
XYZ	xyz(14.4386, 13.6142, 41.9031)
Luminance	0.1361 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F66AE #AE873F

analogous

#3F9EAE #3F66AE #503FAE

triadic

#3F66AE #AE3F66 #66AE3F

tetradic

#3F66AE #AE3F9E #AE873F #3FAE50

square

#3F66AE #AE3F9E #AE873F #3FAE50

split-complementary

#3F66AE #AE503F #9EAE3F

monochromatic

#1E3154 #2F4C81 #3F66AE #6486C7 #90A9D7

Accessibility & contrast

On white

5.64

#3F66AE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#3F66AE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F66AE

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F66AE	#FFFFFF	#000000	##FFFFFF
##3F66AE	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#466DB1

Deuteranopia (green-blind)

#3562AD

Tritanopia (blue-blind)

#007681

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f66ae;
/* rgb */ color: rgb(63, 102, 174);
/* oklch */ color: oklch(51.7% 0.123 261.6);

Tailwind

colors: {
  custom: {
    50: '#7f91c6',
    500: '#3f66ae',
    950: '#000000',
  },
}

SCSS

$custom: #3f66ae;
$custom-light: #7f91c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f66ae",
  "rgb": {
    "r": 63,
    "g": 102,
    "b": 174
  },
  "hsl": {
    "h": 218.919,
    "s": 46.835,
    "l": 46.471
  },
  "oklch": {
    "l": 0.51746,
    "c": 0.12258,
    "h": 261.6
  },
  "luminance": 0.13615
}

Semantic roles & 50–950 ramp

primary

#3F66AE

secondary

#C2AD87

accent

#A851D6

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F66AE

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

Preview Lab → · Contrast checker → · Palette generator →