Chrimson57 themeBrowser Info Environment
Thank you for purchasing our theme.
If you want to change the header background from black to another colour, first you have to put your site on edit mode and click the cog icon on the upper left hand side of the screen. Click design, and under theme block click customise. This should take you to a panel with lots of customisation option. Under header you should see a background colour. Change it to your preferred colour, click save and publish your changes.
As for the banner image, click the cog icon again and hit attributes. Scroll to the very bottom of the panel options and you should see an "image background" setting. Click it to change the image.
I hope I addressed all your concerns. In case I missed anything, let me know.
Thanks and regards,