Customizing my style sheet

I am running the newest version of K2 and I have a custom style/scheme. I am having a hard time figuring out how to edit the entry title and entry category font colors. I have been using the Firebug add on for Firefox to play around with it and just can’t seem the figure it out. I am also looking to add date icons next to the entry titles like I’ve seen on many blogs. My website is https://www.invaderjason.com. Thanks for everyone’s help in advance!