A very informal dinner - dressing up too much, or not enough?

[CMcG]

So, here's my questions: Should I swap the yellow shirt out for a white one, and switch to cream kilt hose? Or do you think I could make the yellow shirt work?
And will a waistcoat alone look out of place? I think I might be able to dig up the jacket that went with the waistcoat but: 1) it's most likely way to small by now. 2) it wasn't bought with a kilt in mind.

I would wear the yellow shirt because it seems more casual and fun than the starkness of a white one. Stick with black hose, unless your cream ones are the really thick, cable-knit ones, because otherwise they tend to look a) rented or b) like athletics socks. In the future you might want to invest in some coloured hose like lovat blue or lovat green.

A waistcoat with no jacket is OK, and please do not ever wear a regular jacket with the kilt because it will be too long and look sloppy. On second thought, check your waistcoat and make sure it isn't too long such that it would get in the way of your sporran... if you're worried about getting cold, a sweater is also a good option, as others have mentioned.

..
I'll try to get pictures up later, if I can and if you need them.

Pictures are always helpful with this sort of thing!

[Melfice]

How would you dress if you weren't wearing a kilt? Dress like that, only with your kilt instead of trousers, and don't worry about matching. No one in Scotland worries about matching their shirt to their kilt. Except, possibly, tourists.

Ah, that is good advice. I was probably overthinking this, yeah. It's just... one colleague asked if I were going to wear the kilt, and that spread like wildfire, and I just want to look smashing, y'know?
I've already had a "kilted" dinner before, but that was in an all-black Utilikilt. It felt easier to dress with that. :P

To very casual add the unbuttoned vest and roll the shirt sleeves up a turn. Let's see pics!

Ooh, that sounds neat, actually. Will try!

Thank you, everybody! The advice was most welcome. I'll try to get pictures of every suggestions when possible, but not today. I forgot I hadn't washed the shirts yet (they're brand new!), so there's that.
Once again, thank you!

[matt.mackinnon]

I'd disagree with the yellow being more casual than a white. A white shirt without a tie is very casual. If you are going with too much colour, it's more of an attention getter than just hanging out type of ware. I've got an informal dinner party to go to this friday, and am planning to ware my Herratage of Scotland kilt with a simple black sporran, white shirt and black hose. I'll probably bring a grey sweater with me in case the party moves outside.

The best advice from here has been wear what you would if you didn't have the kilt.. the kilt is just like a pair of trousers.