Using HTML Code, The Preview Works But Once Hit Save, The Background Color Doesn't Show Up

Using HTML Code, The Preview Works But Once Hit Save, The Background Color Doesn't Show Up

I've noticed on the forum, people have had issues with div tags and the Zoho assistance told them to use tables.

Well, I'm using tables.

When I copy and paste my code into the HTML editor, the preview shows up how it should look, but once I hit "Save & Close", my background color completely disappears. 

This is simple HTML code and I'm not understanding how it's not reading the background code in the tables. 

Is the automatic header and footer disrupting this process? 

Anyone else have this problem?