C# Reflection : call method with class parameters

I've just started out with C# reflection, and I ran into the issue of calling methods that take internal classes as arguments:

Sample class:

public class MyClass 
{
    public class CustomColor 
    {
        public int h;
        public int s;
        public int v;
    }

    public string[] ConvertColors(List<CustomColor> colors)
    {
        //...
    }
}

The code I'm using to call other methods in this class :

FieldInfo info = cInstanceContainerObject.GetType().GetField("_myClass", BindingFlags.GetField | BindingFlags.NonPublic | BindingFlags.Instance);
dynamic myClassObject = info.GetValue(cInstanceContainerObject);

Allowing me to do this :

myClassObject.SomeSampleMethod(int sampleParam);

However, I'm stuck on figuring out how to create the proper parameters for the ConvertColors method above. :(