#3F65CC#3F65CC

#3F65CC is a mid, vivid blue. Relative luminance 0.147; OKLCH L 53.6% C 0.165 H 265.8°. Best body text is #FFFFFF at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#3F65CC
RGB	rgb(63, 101, 204)
HSL	hsl(224, 58%, 52%)
HSV	hsv(224, 69%, 80%)
CMYK	cmyk(69.1%, 50.5%, 0%, 20%)
CIE-LAB	lab(45.25, 20.97, -57.47)
CIE-LCH	lch(45.25, 61.18, 290.04°)
OKLab	oklab(53.55% -0.0121 -0.165)
OKLCH	oklch(53.55% 0.165 265.8)
XYZ	xyz(17.5989, 14.7220, 59.0292)
Luminance	0.1472 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65CC #CCA63F

analogous

#3FABCC #3F65CC #603FCC

triadic

#3F65CC #CC3F65 #65CC3F

tetradic

#3F65CC #CC3FAB #CCA63F #3FCC60

square

#3F65CC #CC3FAB #CCA63F #3FCC60

split-complementary

#3F65CC #CC603F #ABCC3F

monochromatic

#1E3572 #2B4BA3 #3F65CC #6F8CD9 #A0B3E6

Accessibility & contrast

On white

5.32

#3F65CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.94

#3F65CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65CC

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65CC	#FFFFFF	#000000	##FFFFFF
##3F65CC	1.00	5.32	3.94	5.32
#FFFFFF	5.32	1.00	21.00	1.00
#000000	3.94	21.00	1.00	21.00
##FFFFFF	5.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2872D0

Deuteranopia (green-blind)

#0065CA

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3f65cc;
/* rgb */ color: rgb(63, 101, 204);
/* oklch */ color: oklch(53.6% 0.165 265.8);

Tailwind

colors: {
  custom: {
    50: '#8490dc',
    500: '#3f65cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f65cc;
$custom-light: #8490dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65cc",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 204
  },
  "hsl": {
    "h": 223.83,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.53551,
    "c": 0.16549,
    "h": 265.8
  },
  "luminance": 0.14724
}

Semantic roles & 50–950 ramp

primary

#3F65CC

secondary

#D2C295

accent

#B847E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F65CC

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

Preview Lab → · Contrast checker → · Palette generator →