Light skinned vs. Dark skinned

I am a college student and I am trying to work on my final essay in my Comp II class.

I am trying to find opinions from Native People on how, if any, differences exist between light skinned natives and dark skinned natives.

I would great appreciate your thoughts and opinions on this topic that I may use.

Do you find that dark skinned Natives look differently upon light skinned Natives?  Is so, in what way (and vica versa).

Thank you for your help and thoughts!

DJ McClure