How do I change a colour?

Hey ac1977,
For the cart, please try this code in the General Styling ▸ Quick CSS field or in the WordPress ▸ Customize ▸ Additional CSS field:

#top .main_color tr:nth-child(odd), 
#top .main_color .pricing-table>li:nth-child(odd), 
#top .main_color .pricing-extra,
#top .main_color .quantity input.plus, 
#top .main_color .quantity input.minus {
    background: #141414;
}

For the contact form try this css:

 #top .main_color input[type='text'],
 #top .main_color textarea {
 	background: #141414;
 	color: #fff;
 }

After applying the css, please clear your browser cache and check.

Best regards,
Mike

Hi,
Glad we were able to help, if you have any further questions please create a new thread and we will gladly try to help you. Thank you for using Enfold.

Best regards,
Mike