as mentioned on Discord the "Rounds" text is kinda hard to read on dark themes.
From my understanding SWADE uses cttitle_base for the labels on top (Wnd, Ftg...) and also offers cttitle_base_white so that it's easy to change it in a theme (Using <template name="cttitle_base"><cttitle_base_white/></template>) in an extension.

However, this does not include the "Rounds" counter (label_ct_host_rounds).
I imagine offering an easy "switch" as there is for the cttitle-tags now could break some themes, but maybe there is a way?