How to change forum post color background?

[gundrik]

I want to change the background of the posts that users read. Right now, I've changed the coding in the postbit template and replaced the alt1 class: <td class=alt1
with this: <td class=""

Now I'm left with a black background on all new posts, like you see below:


How and where can I put in the code for a solid background with my color of choice?

I've tried adding in bgcolor to the td tag but have had no luck.