More email themes that reduce whitespace

I propose that Zoho add more email themes, specifically ones that reduce the amount of white space.

For example, the sky/wood/plant themes cover more areas of unused white space than do the color themes (which only color the horizontal bars at top and bottom of page).

Suggestion: A light color (the blue, or gray) covering the same areas of the page as the sky/wood/plant themes, would be most welcome.