I wish to recant slightly from my previous position.
I am very interested in clothing, colours, ranks of insignia etc when it's
(a) of interest to the POV character
(b) part of discussion and relevant (eg Which prince do I shoot? The one wearing House Stark yellow!)
(c) necessary for the plot (eg a maid being the only one wearing frills in a murder-mystery)
For example, Amy has a character named Katerin who made herself a dress out of a bed sheet. I didn't pay much attention to her wardrobe before that point, and can't say much after, but, for that moment, the dress was part of the show. Amy could have spent an entire paragraph describing it, and it would have been great since it was of interest to the characters.
Conversely, a lot of people make a lot of fuss about the abilities of the Emperor's assistants and what their wardrobe means. Here's a page that spends about a thousand words on their different types of uniforms for their job duties.

https://www.quora.com/Why-are-the-imper … yal-Guards
I find this troublesome because those guys were never relevant to an MC nor to the story (Not for movie #6 anyway - they're pretty important for the books if you factor in Mara Jade).
they could spend more time telling me about the mains than this riff-raff. I would rather not have had to wait 25 years of my life to learn Yoda had a lightsabre. This kind of stuff is pertinent.