Syntax highlighting
By default, code viewer highlights code syntax ReSharper-style, with distinctive colors for properties, types, accessors, and methods.
dotPeek syntax highlighting for C# with default colors looks as follows:

Select Tools | Options from the main menu , then choose Environment | Viewer on the left.
Use the Color Identifiers checkbox to enable or disable dotPeek syntax highlighting.
Click OK.
This feature is inspired by and borrowed from JetBrains ReSharper, a developer productivity tool for Microsoft Visual Studio.