Add to chart different color and text in front page and new pages

Hi,

I have a problem, in my front page the products show a green add to chart and I can see order in them also in iphone I can see ok the products

but when I add a page that shows products by category the add to chart button changes to grey and are not order the main problem is that iphone and android show very bad the buttons and the letters.

where I can change this setting in order to get alll add to chart buttons in green like front page?

BR