I use template interior and i made 2 copys. jp-onterior-paginas is default, jp-interior-janitor is used by 1 menu-item.
now I want to have an other background color for the bottom D, how can I fix this. When i change the backgroundcolor for jp-interior-paginas but the background color from bottom D created with jp-interior-janitor change too.
What have i done wrong.
i use also 2 layouts and 2 styles

You can not copy the themes.
Please use profiles and assign each profile to a menu item.
A profile is a custom set of theme settings which can define the style, content and layout of your site. The default profile defines the default settings for the entire website. You can create new profiles and assign them to any menu item. This allows you to load different theme settings on different pages. New profiles inherit all settings from the default profile, so you just need to apply the settings you want to change. One example where we use the profiles are the different theme variations we deliver with each theme. Also special module layout behavior is done using profiles.

Video howto:
www.joomlaplates.com/support/documentati...profile-to-menu-item

I use 2 profiles and assign each profile to an other menu item
each profile is assigned with an other layout and loud an other style. I can give each page an other botton color but I can not give an other background color to bottom-d or bottom-c .......
I Can each profile give the grid an other position, but it's not working with the background color of a position !!!!!!

Yes thats right, because the section background are not based on layouts!
The backgrounds have an own menu item, see image below:

So it's not possible to have an other background for example bottom-D on page 1 and bottom-D on page 2

Sorry, thats not possible!