Change Font of Price on Single Product

I need to change my font of the price of the product to a little big bigger and maybe bolder and colored. Its too hard to see .... but Ive looked everywhere in the code for the plugin and can't find it in the modern theme css or anywhere... please help and let me know where it might be. thanks!

My site: http://www.scentswarmers.com/buy/scentsy/lisbon-full-size-scentsy-warmer