Hi there! There isn't much money in color breeding, and it's super easy to blow through a good amount of money quickly in color breeding.
The game is mostly ratings based (regular ratings primarily but also bravery) and while its more challenging and expensive you can become successful with hard work and luck.
On the plus side, color breeding is super easy!
Id suggest buying a pretty colored stallion
Search < Search Horses
Fill in what you want and click For Sale
Some tips:
The best color rating is 1/1 (meaning your horse is the only horse with that color, there are many horses like that however)
At the end of the page/fill out, use the drop down bar to choose sort price: Lowest to Highest
If you want your horse to pass on a gene they have make sure they are homozygous in that gene
For example homo Dun would be DD
(You can tell if you gene test the horse)
Pearl however is recessive, so for a horse to have pearl it must be prlprl or Prlprl
.
Once you have your stallion, find a bunch of cheap mares for breeding (you can find them in the search horses) and breed him to them (you get the babies)
And there you go!