What kind of Jacket/Waistcoat needed?

[MacMillan of Rathdown]

No solid colored/self-coloured hose are classic, in the sense that traditionally in Highland dress hose were always patterned, either in a pattern we call "diced" or in some sort of simplified tartan.

I'm not exactly sure when "always" began, but generally speaking these days hose worn with formal highland attire should preferably be patterned, not plain; but since both the OP and Sandford were referring to day wear highland attire, then solid coloured hose (which have been worn with day wear since the 1860s) are indeed a classic, and in my opinion, the OP's best choice.

[OC Richard]

I'm not exactly sure when "always" began, but generally speaking these days hose worn with formal highland attire should preferably be patterned, not plain; but since both the OP and Sandford were referring to day wear highland attire, then solid coloured hose (which have been worn with day wear since the 1860s) are indeed a classic, and in my opinion, the OP's best choice.

Yes "always" was a bad word choice I suppose... I should have said maybe that all early depictions of Highland dress, from the earliest up through the end of the 18th century, show patterned hose. (At least I think all... off the top of my head I can't think of an 18th century portrait which shows plain hose.)

In the 19th century plain hose show up in unexpected places: In The Highlanders of Scotland one man is wearing the dress uniform the the Atholl Highlanders complete with dress tunic and long hair sporran, but is wearing plain brown hose! And some men are wearing grey "day" jackets with tartan hose. But in the main, plain hose are being worn mostly with grey "day" jackets, tartan hose with black jackets. By the way, none of the plain hose are white or cream... they're all light grey, taupe, or brown. So I can agree that those colours of plain hose are "classic". Cream/offwhite I don't.
By the way not a single figure in the c1915 Rentons book is wearing plain hose...tartan hose are being worn with grey and brown tweed jackets as well as with dressier jackets.

Yes this is certainly all off-topic and this guy will end up with plain hose probably.