Effect of temperature on flower colour

[cmoonbeam1]

Hi all,

I have a recently purchased tolumnia which sent out a few buds from the side of the flower spike after I bought it.

The flowers at the top are the original colour, and the ones at the bottom are the ones that developed in my apartment.

I'm thinking the place it grew up in was warmer than my apartment? Or is it the other way around? I remember it has something to do with red pigment.

Any insight, comments, stories, haiku, whatever, appreciated.