Map addon style/colors with theme editor Nova Style + additional style

Hi,

I have developed an addon which has its own colors, style.
I want to be able to change colors, styles of addon from theme editor.
Most of of the addon colors, style fit existing theme style. The question is how to map adoon style color/style with existing cs cart nova theme for example.
In addition I would need some custom colors that are addon specific.

Do you have an ideea how to do this?
How do add style in rder to not change core files, to preserve existing style
and mapp with addon ones but at the same time to same few colors let say that are addon specific?
I read here but didn t clarified

I am afraid, there is no way to add new fields without changing core files

Example is described in the documentation

https://docs.cs-cart.com/latest/designer_guide/styles.html#example