I've seen this done on other fansites where people will post where you can find a particular outfit, lipstick shade, etc that a character is wearing on a particular episode. I thought that would be cool to do for Troi's character. Rules are:
Post a picture of Deanna Troi with the outfit, makeup look, etc. Or, if you can't find the picture, the series name & episode title or season and episode number so people have a reference.
2. Post a picture of the product and where you can find/buy it.
3. Be respectful
I just thought this would be fun to do, especially if ant of you want to recreate a look of hers for a cosplay. I'll start:
Here's a great dupe for the lipstick Marina wore in TNG (season 2 I think?).
This is Rare Beauty Lip Soufflé Matte cream in shade 'Transform' which is a deep wine. You can find it either on rarebeauty.com or sephora.com
I'll add more things as I find them, but feel free to add anything you come across.
Similar burgandy jumpsuit to the one Marina is wearing above. It's second-hand on the website "The Real Real". It doesn't have that grey collar bit but you could just sew some grey fabric on. This particular one is a US size 6 (UK size 10). Brand name is black halo. So you might want to do a search on "Black halo burgandy v-neck jumpsuit" in your size.
I found a super cheap dupe for the lipstick Marina is wearing here. It's NYX Powder Puff matte finish lip gloss in the shade 'Boys Tears' (love that name, btw). You can find it on amazon.com , nyxcosmetics.com or ulta.com