I just read and used the info from this thread:
That allowed me to change the color of my Add to Cart button.
However, I do have a question, though. Maybe @PC can help.
When I click the 'add to cart' button (which is now the right color), the color of the 'add to cart' text changes to 'items added' but that is still green.
What code do I enter to get the 'items added' to be white?