Depends how orange or red you want to go.
For more of a reddish tinge I would go Mephiston Red base with Carriburg Crimson Wash, then Troll Slayer Orange Highlights.
More orange, Jokareo Orange, with same wash and same highlight.
The last highlight would be something like Yriel Yellow and with just a tiny bit of Abbadon Black on the very tip if you're doing fur.
I'm no color guru and I only have experience with
GW paints, so I'm sure there are plenty of other color combos using other paint brands.
Check out this tutorial and how she does the hair in particular:
https://www.youtube.com/watch?v=EQZCrz3KPpM