#3F66AF#3F66AF

#3F66AF is a mid, vivid blue. Relative luminance 0.137; OKLCH L 51.8% C 0.124 H 261.8°. Best body text is #FFFFFF at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F66AF
RGB	rgb(63, 102, 175)
HSL	hsl(219, 47%, 47%)
HSV	hsv(219, 64%, 69%)
CMYK	cmyk(64%, 41.7%, 0%, 31.4%)
CIE-LAB	lab(43.73, 9.92, -43.08)
CIE-LCH	lch(43.73, 44.21, 282.97°)
OKLab	oklab(51.81% -0.0176 -0.1227)
OKLCH	oklch(51.81% 0.124 261.8)
XYZ	xyz(14.5364, 13.6533, 42.4184)
Luminance	0.1366 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F66AF #AF883F

analogous

#3F9EAF #3F66AF #503FAF

triadic

#3F66AF #AF3F66 #66AF3F

tetradic

#3F66AF #AF3F9E #AF883F #3FAF50

square

#3F66AF #AF3F9E #AF883F #3FAF50

split-complementary

#3F66AF #AF503F #9EAF3F

monochromatic

#1F3255 #2F4C82 #3F66AF #6487C7 #91AAD7

Accessibility & contrast

On white

5.63

#3F66AF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#3F66AF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F66AF

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F66AF	#FFFFFF	#000000	##FFFFFF
##3F66AF	1.00	5.63	3.73	5.63
#FFFFFF	5.63	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#456DB2

Deuteranopia (green-blind)

#3463AD

Tritanopia (blue-blind)

#007782

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f66af;
/* rgb */ color: rgb(63, 102, 175);
/* oklch */ color: oklch(51.8% 0.124 261.8);

Tailwind

colors: {
  custom: {
    50: '#7f91c7',
    500: '#3f66af',
    950: '#000000',
  },
}

SCSS

$custom: #3f66af;
$custom-light: #7f91c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f66af",
  "rgb": {
    "r": 63,
    "g": 102,
    "b": 175
  },
  "hsl": {
    "h": 219.107,
    "s": 47.059,
    "l": 46.667
  },
  "oklch": {
    "l": 0.51808,
    "c": 0.12398,
    "h": 261.8
  },
  "luminance": 0.13655
}

Semantic roles & 50–950 ramp

primary

#3F66AF

secondary

#C3AE87

accent

#A851D7

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F66AF

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

Preview Lab → · Contrast checker → · Palette generator →