The curtains are likely custom and hence matched up with the other fabrics. Beautiful I might add.

Hi there, You can actually get curtain rods meant to accomodate corners on the wall. I didn't see a product listing for one on Houzz yet, but a quick google search may help!

Kirsch makes rods that are adjustable for bay windows

Pumpkin seeds - 113 by Benjamin Moore is similar:

http://www.benjaminmoore.com/bmpsweb/portals/bmps.portal?_nfpb=true&_windowLabel=sidebarportlet_1_2&sidebarportlet_1_2_actionOverride=%2Fbm%2Fcms%2FContentRenderer%2FselectSideBarArticle&sidebarportlet_1_2np=public_site%2Farticles%2Fapplication_article%2Fapp_colorExplorerTool&sidebarportlet_1_2isNonSecure=true&_pageLabel=fh_explorecolor&cd=113&col=CC