Having one color code either in hexadecimal or RGB. Keeping this as base, need to generate lighter & darker gradient colors based on percentage in C#

Question

I have a base color code (in this example it is "#0078D4") either in hexadecimal or RGB. Keeping this as base, I need to generate lighter and darker gradient colors based on %percentage. Is there any C# code or algorithm there to achieve this?

#004478 | Darken 18% | rgb(0,68,120)

#005ba1 | Darken 10% | rgb(0,91,161)

#006fc5 | Darken 3% | rgb(0,111,197)

#0078D4 | rgb(0,120,212) |

#0086ed | Lighten 5% | rgb(0,134,237)

#4fb3ff | Lighten 24% | rgb(79,179,255)

#bae1ff | Lighten 46% | rgb(186,225,255)

# d9efff | Lighten 51% | rgb(217,239,255)

# edf7ff | Lighten 55% | rgb(237,247,255)

Answer 1

in System.Drawing you can use:

Color color = Color.FromArgb(r, g, b);
var h = color.GetHue();
var s = color.GetSaturation();
var l = color.GetBrightness(); <-- increase or decrease

in System.Windows.Forms you can use the

`ControlPaint.Light/Dark Method

var result = ColorPaint.Dark(rgb(0,68,120), .18);