Essays / Colors in Graphic Design -CHOOSING AN INTERESTING THESIS STATEMENT,PROPOSAL [6]

Hello, I am new in this forum. I am really having trouble in choosing an interesting powerful thesis statement, proposal . My thesis topic is Colors in Graphic Design. I have to make a project at the end of my thesis and I have no idea what to do the project about... any suggestions ? I also dont know how to put together my topic with my proposal to give a tittle to my thesis. Since it has to be written in english and english is not my first language I would appreciate any suggestions.

-Printing in less and soy ink based colors, safe the environment.
-color-blind people, are not taken into consideration by graphic designers and marketing.
-Black and White, are they colors, background, spaces?
-Why is Green the color of ecology?

Thank you ever so much for your help and advise in advance.