[Theme Horse Support Team]

Hi patricia,

I think you have requested red color but still getting light blue. Because the color hex code you are using is only 5 digit #f2000 which must be #f20000 (6 digits)

There is no any recommended image size for background image. You may use any size image which fits your design. The image will be displayed to 100% either you use big or small image.

Thank you!