Unexpected Block of Color

Site URL: https://www.oceanparkstudio.com/

Hello! I know I will kick myself over this . . . but can anyone please tell me why I have a pale grey banner separating the main section of my home page and the footer? It appears to be a border from the main section, but I have changed ALL the color presets in this profile to the dark blue or white in an effort to get rid of the grey, and it's still there. So what switch am I not seeing to make this go away? Thank you!

Thank you! I don't understand why that required custom code - shouldn't that be part of the Style Guide / Colors section? But in any case, it worked, and I am grateful!

I guess you can change it in Design > Site Styles. You can play around there