Hmm, softshell fabric not cheap... about $28.00 per yard. (if I were theoretically going to sew myself a new softshell jacket). #sewing
So, the problem with something like black or blue or green, is then it's not terribly obvious you've sewn yourself a jacket (because all the softshells out there are black or blue or green)., But purple or "tomato" are way off the usual scale of colors. Which means you've got to be willing to show off a bit, lol. (I have no problem with it--ie random strangers chatting with you because you have an outrageously loud outfit--but the family prefers to blend in and hide....)
@ai6yr here's another decent vendor, for some more color options--although the pricing is about the same https://discoveryfabrics.com/collections/softshells
Softshells

@piebob @ai6yr Soft shell / Softshell Plain Fabric Water Repellent & Wind Blocker – G.k Fashion Fabrics https://share.google/LAel9a9CZ5G7j3v7R This one is priced per 1/2 yard, which is annoying, but two 1/2 yards is still significantly less than what you're showing up there. However you might have to ask about the shipping cost.
Soft shell / Softshell Plain Fabric Water Repellent & Wind Blocker

@Ashmire @piebob Thanks! They have a "new customer discount" which might nullify the shipping for the first one, so definitely will look at that one.
@Ashmire @piebob Ouch, Canadian... tariffs and shipping likely will make that a nonstarter.