How to change the text color in quantity field in woocommerce plugin

I’ve downloaded the theme unite and changed the color scheme. The problem is when I add an item to the cart, the coupon code button, apply coupon and add to cart buttons are showing up as white and not black. Also, because my text is white throughout the site, in the quantity box you can’t see the number because the text is white. How can I change the button colors and the text for just the quantity field.