Main Color

Sorry if this is a noob question
But how do I change the main color on this theme?

The footer background seems to continue to override any custom CSS I try to apply.

Hey there,

I hope you are well today and thank you for your question.

You can try achieving this by adding the following CSS code in the Custom CSS option of your theme on the below path.

Admin Area -> Appearance -> Customize -> Additional CSS

/*change footer color*/
#colophon {
    background-color: #333333 !important;
}

Best regards,
Support.