#3F63CC#3F63CC

#3F63CC is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.1% C 0.168 H 266.4°. Best body text is #FFFFFF at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#3F63CC
RGB	rgb(63, 99, 204)
HSL	hsl(225, 58%, 52%)
HSV	hsv(225, 69%, 80%)
CMYK	cmyk(69.1%, 51.5%, 0%, 20%)
CIE-LAB	lab(44.71, 22.24, -58.34)
CIE-LCH	lch(44.71, 62.44, 290.87°)
OKLab	oklab(53.14% -0.0104 -0.1676)
OKLCH	oklch(53.14% 0.168 266.4)
XYZ	xyz(17.4070, 14.3383, 58.9652)
Luminance	0.1434 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63CC #CCA83F

analogous

#3FA9CC #3F63CC #623FCC

triadic

#3F63CC #CC3F63 #63CC3F

tetradic

#3F63CC #CC3FA9 #CCA83F #3FCC62

square

#3F63CC #CC3FA9 #CCA83F #3FCC62

split-complementary

#3F63CC #CC623F #A9CC3F

monochromatic

#1E3472 #2B4AA3 #3F63CC #6F8AD9 #A0B2E6

Accessibility & contrast

On white

5.43

#3F63CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#3F63CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63CC

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63CC	#FFFFFF	#000000	##FFFFFF
##3F63CC	1.00	5.43	3.87	5.43
#FFFFFF	5.43	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2171D0

Deuteranopia (green-blind)

#0064CA

Tritanopia (blue-blind)

#007C8E

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3f63cc;
/* rgb */ color: rgb(63, 99, 204);
/* oklch */ color: oklch(53.1% 0.168 266.4);

Tailwind

colors: {
  custom: {
    50: '#848edc',
    500: '#3f63cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f63cc;
$custom-light: #848edc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63cc",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 204
  },
  "hsl": {
    "h": 224.681,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.53144,
    "c": 0.16794,
    "h": 266.4
  },
  "luminance": 0.1434
}

Semantic roles & 50–950 ramp

primary

#3F63CC

secondary

#D2C295

accent

#BA47E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F63CC

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

Preview Lab → · Contrast checker → · Palette generator →