Right Gents - Have at me

[Christopher]

My advice, for what it's worth, on an outfit for each occasion (informal and formal). Remember that this is only one outfit and there are countless other combinations that will work just fine:

Informal: Tan or light brown button down shirt with sleeves rolled up or down to your preference (could substitute appropriate T-shirt or Polo Shirt); brown Belt (2.5 to 3-inch wide with brass buckle); oatmeal or greenish hose...or even hiking socks...pushed down to your brown hiking boots (I prefer Doc Martens but you can choose whatever you like); Brown Freelander Mrk III Sporran. If you choose to use a black belt, get one with a silver buckle and switch to black boots and black sporran. Try and select hose/socks and shirt that are single color (or subtle pattern) and aren't too garish or they'll detract from the kilt.

Formal: White tuxedo shirt; black bow tie; off-white hose; red or green flashes; black belt with silver buckle; white rabbit fur sporran with silver adornment; black Prince Charlie jacket and waist coat or black Argyll jacket and 5-button vest; silver, black or pearl studs and cufflinks; black dress shoes or black Ghillie Brogues; sgian dubh with black handle and silver or gem top tucked into top of hose on side of whichever leg matches your handedness (i.e. if you're right handed, tuck sgian dubh into top of hose on side of right leg).

The key is that silver accents go with black and brass accents go with brown. Don't wear brass buckles/adornment with black belt/sporran/shoes or silver buckles/adornment with brown belts/sporran/shoes, etc. Also, on average, black is more formalish than brown.

Only a guideline and others might disagree...but there you go.