Styles.base

Hi there,

I want to change the look of my email templates because there are some layout issues with different mail clients.

e.g. I want to change the background colour. In the code below from the "header" snippet, it has a dynamic variable {{ styles.base }}.

 
Where can I find the actual value of this variable?

The system takes color from Theme editor

http://prntscr.com/gdwlsh

But you can set color directly in the code. E.g.