If like to believe that's real, but there is no red/pink/orange in budgies. The real rainbow mutation is blue, green, yellow unfortunately. It isn't as stunning as that one.
Eclectus, CAG, BH Pionus, Maximilian’s Pionus, Quakers, Indian Ringnecks, Green Cheeked Conures, Black Capped Conures, Cockatiels, Lovebirds, Budgies, Canaries, Diamond Doves, Zebra Finches, Society F
Unfortunately parrotlover2001 is correct. Mutations can remove and rearrange colors but cannot add them. No red based colors (including orange pink and purple) are present in budgies.