More pastel like color palettes?

[deronsizemore]

I have a HEX value which I use and create a complimentary color, etc. with it.

Here's an example:

grapefruit_object = Color.NewFromHtml(hex)
create_complementary = Color.NewFromRgb(*grapefruit_object).ComplementaryColor(mode='rgb')
complementary = create_complementary.html

The problem is that a lot of the colors don't seem to be real pleasing to the eye. Does anyone have any experience with color manipulation? I'd like to see if it's possible to do some adjusting with the colors to get a more pastel type shade of each color, I'm just not sure what to adjust or if it's even possible?

[xav]

Have you tried a high value and low/med saturation in HSV? ("official" definition of pastel from https://en.wikipedia.org/wiki/Pastel_(color))