Parameter/variable type color

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Visual-Studio

color

In Visual Studio (we are using 2013 Professional with Update 5), type names of parameters and variables are shown in different colors depending on their type, e.g.

string aString;
String anotherString;

Is it possible to change the color of "string" to the color of "String"?
If it's not possible with VS itself, how can that be done with ReSharper?
(Making your colleagues happy can be a demanding job...)

What I have tried:

In Visual Studio, go to Tools - Options - Environment - Fonts and Colors. An enormous number is available, but which pair do I have to pick?