Hi Molby: I like dark reverses, too. To me, I think they can be the prettiest part of the flower (and I'm not the only one who thinks that). Sometimes, too, I see beauty in a bud that I think is prettier than the flower itself. I've been taking pictures of buds last couple years and hope to someday put together a slide show. Problem is, it's hard to get good detail closeups--just like Connie says it is about stem detail.
Here's another Redgoldina X Mission Chimes that's different. It produces two different flower forms and colors on the same plant. Picture 1 shows typical trumpet form with a green brown reverse with a green mid rib. It has a dark style/stigma and longer pedicel then example #2. Picture 2 shows a slighter shorter 'fat body' style that has a brown red reverse and brown redish mid rib. It has a shorter pedicel and greyish style/stigma. No beauty, front or back--just something one doesn't see everyday.