#3F63CF#3F63CF

#3F63CF is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.4% C 0.172 H 266.6°. Best body text is #FFFFFF at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#3F63CF
RGB	rgb(63, 99, 207)
HSL	hsl(225, 60%, 53%)
HSV	hsv(225, 70%, 81%)
CMYK	cmyk(69.6%, 52.2%, 0%, 18.8%)
CIE-LAB	lab(44.92, 23.32, -59.73)
CIE-LCH	lch(44.92, 64.13, 291.33°)
OKLab	oklab(53.36% -0.0101 -0.1717)
OKLCH	oklch(53.36% 0.172 266.6)
XYZ	xyz(17.7703, 14.4836, 60.8785)
Luminance	0.1449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63CF #CFAB3F

analogous

#3FABCF #3F63CF #633FCF

triadic

#3F63CF #CF3F63 #63CF3F

tetradic

#3F63CF #CF3FAB #CFAB3F #3FCF63

square

#3F63CF #CF3FAB #CFAB3F #3FCF63

split-complementary

#3F63CF #CF633F #ABCF3F

monochromatic

#1E3476 #2A49A7 #3F63CF #708BDB #A1B3E7

Accessibility & contrast

On white

5.39

#3F63CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#3F63CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63CF

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63CF	#FFFFFF	#000000	##FFFFFF
##3F63CF	1.00	5.39	3.90	5.39
#FFFFFF	5.39	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B71D3

Deuteranopia (green-blind)

#0064CD

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3f63cf;
/* rgb */ color: rgb(63, 99, 207);
/* oklch */ color: oklch(53.4% 0.172 266.6);

Tailwind

colors: {
  custom: {
    50: '#858ede',
    500: '#3f63cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f63cf;
$custom-light: #858ede;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63cf",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 207
  },
  "hsl": {
    "h": 225,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.53364,
    "c": 0.17202,
    "h": 266.6
  },
  "luminance": 0.14485
}

Semantic roles & 50–950 ramp

primary

#3F63CF

secondary

#D4C496

accent

#BC45E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F63CF

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

Preview Lab → · Contrast checker → · Palette generator →