#3F63D3#3F63D3

#3F63D3 is a mid, vivid blue. Relative luminance 0.147; OKLCH L 53.7% C 0.177 H 266.8°. Best body text is #FFFFFF at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#3F63D3
RGB	rgb(63, 99, 211)
HSL	hsl(225, 63%, 54%)
HSV	hsv(225, 70%, 83%)
CMYK	cmyk(70.1%, 53.1%, 0%, 17.3%)
CIE-LAB	lab(45.20, 24.76, -61.58)
CIE-LCH	lch(45.20, 66.37, 291.91°)
OKLab	oklab(53.66% -0.0098 -0.1771)
OKLCH	oklch(53.66% 0.177 266.8)
XYZ	xyz(18.2655, 14.6817, 63.4866)
Luminance	0.1468 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63D3 #D3AF3F

analogous

#3FADD3 #3F63D3 #653FD3

triadic

#3F63D3 #D33F63 #63D33F

tetradic

#3F63D3 #D33FAD #D3AF3F #3FD365

square

#3F63D3 #D33FAD #D3AF3F #3FD365

split-complementary

#3F63D3 #D3653F #ADD33F

monochromatic

#1C337B #2848AD #3F63D3 #718BDE #A3B4EA

Accessibility & contrast

On white

5.33

#3F63D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.94

#3F63D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63D3

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63D3	#FFFFFF	#000000	##FFFFFF
##3F63D3	1.00	5.33	3.94	5.33
#FFFFFF	5.33	1.00	21.00	1.00
#000000	3.94	21.00	1.00	21.00
##FFFFFF	5.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1172D7

Deuteranopia (green-blind)

#0064D1

Tritanopia (blue-blind)

#007E91

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3f63d3;
/* rgb */ color: rgb(63, 99, 211);
/* oklch */ color: oklch(53.7% 0.177 266.8);

Tailwind

colors: {
  custom: {
    50: '#868ee1',
    500: '#3f63d3',
    950: '#000000',
  },
}

SCSS

$custom: #3f63d3;
$custom-light: #868ee1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63d3",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 211
  },
  "hsl": {
    "h": 225.405,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.53661,
    "c": 0.17741,
    "h": 266.8
  },
  "luminance": 0.14684
}

Semantic roles & 50–950 ramp

primary

#3F63D3

secondary

#D7C797

accent

#BE42E6

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0D0C15

muted

#7D7D83

Preview Lab

Preview with #3F63D3

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

Preview Lab → · Contrast checker → · Palette generator →