I notice that there a lot of questions, mostly in the "support requests-section" how to change colors and fonts.
Mostly these people have not run a search here in the forum as these questions are answered many times already.
I feel the need to explain this once and forever ;=)
1. Be clear which section / which part you want to change or refine
2. Check if you can do that with the existent options
Here you can enter any CSS-definition which you want and this will not be overwritten by upcoming updates.
But how to identify which styles are to change? For this there is a good tool at hand (I mentioned this already in some postings):
a) Use the Firefox-Browser
b) Install the Webdeveloper-Extension which you can download from here: http://chrispederick.com/work/web-developer/
c) after installing it., choose to activate the "style-information":
d) then go the part of the page which you want to identify: move the cursor over the element you want to identify:
it will get a red border:
e) when you identified the desired element and moved the cursor over that element, you will get the necessary style-information in the "webdeveloper bar":
in my example it is the image in the post.
The following image shows the definitions for the image in a post:
I hope this small guide will help and Sayontan must not answer the same questions too often!