In case designs Gmail does not convince you at all, you can also put a background image inbox (it is recommended to use with good quality image display to prevent distorted). To start this procedure must have the image you want on your computer ready and then enter the Gmail settings.
Select the scroll wheel configuration and give it click “Themes” (this option is on the top right of the page). Then you place yourself on Custom Themes and select where it says “select a background image”, a window where you must guide you on “upload photos” only remains to select the “Select picture from computer” and find the image and drag the image will open and that would be it.
Would you like the idea of putting a picture of someone special in your Gmail account? Now you can do it quickly by simply entering “custom themes” that are in Gmail.