How do I change the color used in cctree?

The default color in cctree is too hard to read as my vim has a black
background.
http://i.imgur.com/OmTb7.png
How do I change the dark blue to my like?
I use :highlight to list all color settings.
But I don't find one which is darkblue on black.
All the items related CCTree are shown in the following link.
http://i.imgur.com/Xf8f0.png

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