|The Pagoda at Kew Gardens on a postcard which is now in California!|
As I commented to Pat, the really weird thing is that the Pagoda is actually a strong maroon crimson shade but it always looks an atmospheric perspective blue whenever it's looked at from the big west east axis which runs across Kew Gardens.
On the other hand you'd be surprised how much crimson was required to get those really dark greens (complementary colours can create a very dark colour)! The backlighting makes dark foliage even darker than usual.
Link: this is my website about The Royal Botanic Gardens at Kew