I'm not sure about colours, but imo, in terms of who should be in it, I would say the four mains that are in the current one (Troian, Ashley, Shay, Lucy) but maybe also add Janel and Sasha.
The most recent shoots don't include all of them, but this season 2/3 one does (although I'm not sure how usable the pics would be) -
Troian -
1,
2,
3
Shay -
1,
2,
3
Ashley -
1,
2,
3
Lucy -
1,
2,
3
Janel -
1,
2
Sasha -
1,
2