[OH3] oh-clock-card text color

Tags: #<Tag:0x00007f173b0fb320>

Has anyone an idea on how to change the text color of the oh-clock-card widget?

Background can be changed, but the text color stays black obviously, which is sometimes not desired.

I tried to add the corresponding CSS argument (color: rgba(255,255,255) to the YAML code, but without effect.