Hi Mohamed,
Thank you for letting me know which class to use. I have been following this document and thus far have made all my changes with the help of this doc, however using the Developer Extension in Google, I was able to find that this infact was under "label-info" however, when I added this change into the custom CSS it did not clear the orig color and change it to my colors, and I am not sure why yet, so thank you for verifying that this was the correct class but I think that the original blue color is not getting cleared for some reason when I add the custom edit, but I will continue to work on it and see if I can figure out why.
Cheers!