i'm stuck in tumblr theme customization?

[Gabriela]

i made a couple of changes, mostly by trial and error, but now i am stuck with a problem about the tags showing under pictures..their font and background are black so i can't see anything..and i don't want to start changing all the colors again, cause i don't understand that whole css thing, i am not a programmer. does anyone know exactly what exactly i should look for to change the font color just for the tags? thanks