What interiors work with Sepang?
 

Yes, Rock Grey and Black would be the standard for a bright blue exterior but not interiors I would otherwise chose. How about Cedar? Or Nougat? Or is that just too strong an interior color with too strong an exterior? Any pictures to show? My fallback is Cedar on Ink Blue.

You can imagine it better by associating the Sepang Blue Exterior like a shirt you would wear and the interior as your pants. IMO, Black is the safest bet. For my S5, I went for Lunar Silver but would have spec'd Pistachio if it were available. Nougat seems to work out OK. I do not see Cedar as a choice. Cedar would be great with greys, whites, silvers and beige exteriors.

Just my 2-cents...