What is this colour scheme element?

Question

I'm using VS2010 with ReSharper and "Son Of Obsidian" theme and have the following frustrating highlighting issue in String.Format sections.

Selecting a method (or any) parameter gives the grey background - see string bString in picture. But the highlighting inside the String.Format string is different, and unreadable.

In "Tools > Options > Font and Colors" I've tried: "Selected Text", "Inactive Selected Text" and "Highlighted Reference" both in vain.

So please:

a) What do I need to change

b) Is there a decent way of finding it out (I've tried doing a screen grab for the Hex color code and searching for that in the style XML, but that doesn't work)

Answer 1

After an age of trying this out on my home PC I've discovered the element in question is ReSharper Matched Format String Item

There should really be an easier way of finding this stuff out