Just to add my ha’pennyworth, as I knew I’d seen it somewhere in the wiki - plaid does appear (though in a picture rather than mentioned) in the Varushka look and feel, as a sort of patterned cloth that might be used as a cheap alternative to the preferred elaborate embroidery.
https://www.profounddecisions.co.uk/empire-wiki/Varushka_look_and_feel
I think SevenSecrets is referring to the image under Practical Varushkans.
On group cohesion, doing a sash in a harlequin pattern of the company’s colours could be a good easy way of uniting an otherwise disparate bunch of league outfits for starting out. I’ve no idea how well a slashed sash would work out in practice but the fabrics might prove cheaper and/or easier to source, if a bit more effort in the sewing.
@Unslain that’s a pretty good idea, turns out there is quite a lot of harlequin material available online. (Especially Etsy.)
Also spotted ‘damask’ pattern fabrics which look perfect for a League inspired project.