I want my cart to indicate that there is products in it.

This is the website: https://gymboxxx.myshopify.com/. I want when something is adding to the cart to remove the pop up and then when the product is added to the cart, the cart icon to be blue( blue color like the social icons mouse over effect). Tell me how to remove the pop up message. I am changing the name of the modal-dialog-box.liquid to modal-dialog-box2.liquid and the message dissappear but I am wondering is this a right way to do it. The other way is to put the code inside this symbols "<!--" /code here "-->". Tell me is this the right way. When the message is gone when adding product to cart the cart must became blue. Tell me how to make the cart blue when procducts are in it. Thank you.