C#: Create a lighter/darker color based on a system color

Question

Duplicate

How do I adjust the brightness of a color?
How do I determine darker or lighter color variant of a given color?
Programmat

Answer 1

You can also simply work on the RGB percentage to get it lighter or darker as you want, Here is an example for how to make a color darker x% than it is:

//_correctionfactory in percentage, e.g 50 = make it darker 50%
    private Color DarkerColor(Color color, float correctionfactory = 50f)
    {
        const float hundredpercent = 100f;                        
        return Color.FromArgb((int)(((float)color.R / hundredpercent) * correctionfactory),
            (int)(((float)color.G / hundredpercent) * correctionfactory), (int)(((float)color.B / hundredpercent) * correctionfactory));
    }

One more thing we can also reverse the process to be lighter instead, Only we getting the result of 255 - RGB and then multiply it by the percentage we want like the following example:

private Color LighterColor(Color color, float correctionfactory = 50f)
    {
        correctionfactory = correctionfactory / 100f;
        const float rgb255 = 255f;
        return Color.FromArgb((int)((float)color.R + ((rgb255 - (float)color.R) * correctionfactory)), (int)((float)color.G + ((rgb255 - (float)color.G) * correctionfactory)), (int)((float)color.B + ((rgb255 - (float)color.B) * correctionfactory))
            );
    }

Hope that helps.