I’ve had a piece of chartreuse green wool coating in my stash for years. I originally bought it to make a Burda coat and then rapidly changed my mind about the colour. The Burda got made up in a more neutral colour and the green coating sat waiting for the right pattern to come along.

Years and a house move later I still haven’t found anything to do with it. Occasionally I pull it out, look through my entire pattern stash, and then put it back again. There is only three metres of it which isn’t enough for the sort of big dramatic coat or cape I’m drawn to, and it’s too heavy for any other sort of clothing. I even considered selling it.
Lately I’ve been getting into vintage Vogue designs from the 1980s, especially those by Claude Montana. I’ve picked up a few patterns off eBay, including this one from 1986. It only needs three metres.

And I also have the Vogue pattern that the jacket pattern recommends to use for those enormous shoulder pads.
I haven’t been able to find an image of the original garment other than the one on the Vogue envelope, but here’s one with a very similar feel. This sort of coat often seems to come in very bright colours and be styled over black garments.

And here are a couple of links to rather blurry YouTube videos of Montana shows with very similar coats in the most amazing colours.
The chartreuse green should fit right in amongst that lot. And even better, I have most of the other things I need for making the coat in my stash.
There are a few unknowns: the coat requires a bound buttonhole which is a new technique to me, and I still haven’t quite got my head around the construction of the concealed button band which closes it down the front. And the pattern calls for finishing all the internal seams with home made bias binding because the jacket is only half lined. No way I am doing that, so I need to line the whole thing which means working out how to make it go around the back vent.
I think this one will keep me busy for a while.