@TweedyProf I agree re. lots of colors being taupe if it's considered brown-gray, which is what I'd consider it. And on second look at Claghorn's jacket, it is darker or more saturated than the ones I was thinking are great for summer. I would consider the Formosa jacket I posted to be taupe. It looks a lot like the one you just posted. What fabric is that, if you don't mind my asking?
But the contrast to navy may be more clear in this pic of the jacket in question next to a navy jacket (L to R: 0520 fresco, navy finmeresco, dark brown fresco, taupe hopsack). Although this pic, taken at twilight, isn't ideal either.
I wore the brown jacket to one of the Styleforum 10th Anniversary events, and here's a pic (w/ blue jeans), that might be helpful. I really like this original color but also see the appeal of the lighter Slewfoot and DWW versions.