XF 2.3 Move style parameters to "Alternate"?

[USCSS_Nostromo]

In version 2.2 I had two styles on the forum: dark and light.
In version 2.3 there is now the option to have one forum style with two parameters – dark and light.
Question:
For example, I currently have a "Light style" and a "Dark style."
Can I move the parameters of the "Dark style" into the "Light style" as an Alternate?

Thanks.