Changing color of the Anew theme

Hi!
I’ve installed a WordPress theme: Anew ( https://alxmedia.se/themes/anew/ )
Theme work great by i’ve a problem with the modify of the color of the “Standard Post”.
How you can see in the screen, the option panel see the option for the color for every type of post, except the “Standard post”, so i want modify the file of the theme fot changing the color of this type of post.

Someone can help me? In Screenshot you can see:
1) The option panel: https://s2.postimg.org/nypkj7td5/image.jpg
2) The “Standard Post”: https://s4.postimg.org/tps1u1qrx/image.jpg

Thanks a lot and sorry for my italian.