#3F63BF#3F63BF

#3F63BF is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.2% C 0.150 H 265.4°. Best body text is #FFFFFF at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F63BF
RGB	rgb(63, 99, 191)
HSL	hsl(223, 50%, 50%)
HSV	hsv(223, 67%, 75%)
CMYK	cmyk(67%, 48.2%, 0%, 25.1%)
CIE-LAB	lab(43.86, 17.56, -52.21)
CIE-LCH	lch(43.86, 55.09, 288.59°)
OKLab	oklab(52.22% -0.0119 -0.1496)
OKLCH	oklch(52.22% 0.15 265.4)
XYZ	xyz(15.9124, 13.7405, 51.0937)
Luminance	0.1374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F63BF #BF9B3F

analogous

#3FA3BF #3F63BF #5B3FBF

triadic

#3F63BF #BF3F63 #63BF3F

tetradic

#3F63BF #BF3FA3 #BF9B3F #3FBF5B

square

#3F63BF #BF3FA3 #BF9B3F #3FBF5B

split-complementary

#3F63BF #BF5B3F #A3BF3F

monochromatic

#213363 #304B91 #3F63BF #6D88CF #9BADDE

Accessibility & contrast

On white

5.60

#3F63BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#3F63BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F63BF

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F63BF	#FFFFFF	#000000	##FFFFFF
##3F63BF	1.00	5.60	3.75	5.60
#FFFFFF	5.60	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#326EC2

Deuteranopia (green-blind)

#1462BD

Tritanopia (blue-blind)

#007888

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f63bf;
/* rgb */ color: rgb(63, 99, 191);
/* oklch */ color: oklch(52.2% 0.150 265.4);

Tailwind

colors: {
  custom: {
    50: '#828ed3',
    500: '#3f63bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f63bf;
$custom-light: #828ed3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f63bf",
  "rgb": {
    "r": 63,
    "g": 99,
    "b": 191
  },
  "hsl": {
    "h": 223.125,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.52219,
    "c": 0.15006,
    "h": 265.4
  },
  "luminance": 0.13742
}

Semantic roles & 50–950 ramp

primary

#3F63BF

secondary

#CABA90

accent

#B34EDA

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0C0C14

muted

#7D7D83

Preview Lab

Preview with #3F63BF

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

Preview Lab → · Contrast checker → · Palette generator →