Remove pink, CSS

I changed the css of frontend_custom.css just found out I should not have done so. For now I would like to remove a pink color found on my product category page > www.houseoffayon.com/index.php/products-listing do you see that pink color just about the shoe, how do I remove that if any one can figure that out I have been at it for some time now. Thank you.

That's the background color you set in the hikashop options of your menu.
Go in the menu Display->Content menus, edit your menu and there you will have an option on the right to change the background color. There is no need to change the CSS.