The orange is a tertiary color in this system, i.e when working with pigments of any kind, to obtain orange first two of the primary subtractive colors (specifically, magenta and yellow) must be mixed, obtaining red (secondary), and Then mix it with yellow.

Lovely
Great photo – the color is as close to nature as a photo can get.
I love it flow
Gorgeous color. SO nice to see original photography.
Hard to come by on this site. 🙁
Beautiful
Es este precioso caléndula