Step 1: In the interact quick menu, select "Branding & Styling"
Step 2: Background color: usually just leave white
In the left grey sidebar, click on "background color" to select the color you want, I almost always just leave it white because the goal is to make your quiz look like it's part of your website and most websites have white backgrounds.
Step 3: Font color: usually just leave black
Navigate to "Font Color" on the left grey sidebar and you can change the color of your quiz font, usually leave it black to match your website
Step 4: Change "take quiz" button color to match the other buttons on your website
Step 5: Change font type: match your website
Step 6: Add your logo (if you'd like to upgrade now)
Click on "Edit Image" under "Logo Image"
Now upload your logo image 250px by 150px is recommended for the size of the logo
Now your logo is on your quiz!