Sam2 – Bigdei Tziv’onim, in a general sense, definitely means colored clothing. This is clear in many places in Shas.
And in terms of the general topic, I agree with many others – as long as one makes absolutely certain that it is not translucent in any way, then there is certainly no Tzenius issue. The aforementioned bride was misguided, as she acted contrary to Minhag Yisrael.