Edges bleaching/discoloration

Hi, peopole!
Firstly, i want to sorry for my bad english.

I have a small question, may be someone can help me with it.
I do my small project and want to do graphic style like it done in Planetary Annihilation.
And i can’t find information about them shading mode or them post process.

How i can do similar sharp edge discoloration (highlight in white) to do my Low-Poly models more sharp looking?
Any ideas are wellcome!

I realy hope someone can help me with it.