Ssh – How do I change the colour scheme on putty?

I’m using PuTTY to SSH from my PC at home to Linux computers at work, but some of the text (folder names) is dark blue on black, which is almost impossible to read. How do I change the colour-scheme?

My computer at home has Windows 7 in case it makes any difference.

Solution:

In the PuTTY configuration window on the left side (the category section) there is an expandable item called Window and under that item is Colours. That is where color changes can be made.