E or e black or red

A (or At) or a bay (or brown) or not

Ccr or C Cream or not

Rn or rn roan or not

D or d dun or not

Prl or prl not pearl or pearl

Z or z silver or not silver

Ch or ch Champagne or not

G or g Gray or not

W or w dominant white or not

To or to Tobiano or not

Spl or spl Splash white or not

Sb or sb Sabino or not

Rb or rb Rabicano or not

O or o Frame or not (OO is lethal, so foal dies)

Lp or lp Leopard complex (appaloosa) or not

PATN-1 or patn-1 Leopard pattern 1 variations or no pattern

PATN-2 or patn-2 Leopard pattern 2 variations or no pattern

Horses can be appaloosa with no pattern, but horses that have lplp (not appaloosa) don't have a pattern even with dominant pattern genes

Hope that makes it clear as mud.

Also: this post

https://horseeden.com/forums.php?f=11&t=24955

At the bottom I explain what special color names are assigned to some of these gene combinations. Also the Game Guide lists all the appaloosa patterns for each pattern gene.

https://horseeden.com/forums.php?f=25

they should be a good start to learn everything about genetics