I would get the best tangerine gecko possible and pair it with a nice Mack snow. Then I'd cross the most tang Mack snow babies back to the snow parent (or to each other if you produce males and females). I'd recommend a Mack snow rather than a super snow because you won't be able to tell the quality of color and spotting with a super snow since they all come out looking pretty much the same. Good luck.
Honestly i wouldent start from scrach, it took many generations to get the colored creams we have today, id get a cream and just breed it to a nice tang.