Black: E/e One or 2 large E's will make black based horses while 2 small e's will make red based horses.
Bay: A/a Bay only effects black based horses. One or two large A's turns blacks into bays. Two small a's has no effect.
Cream: -/- Regular cream is a C and has no effect. One Ccr makes palominos, buckskins and smokey blacks. Two Ccr's makes cremellos, perlinos and smokey creams.
Dun: -/- One or two large D's will make a horse a dun or a grullo. Small d's have no effect.
Gray: -/- One or two large G's will make a horse gray. Horse with 2 G's will turn gray faster then horses with one G. Two small g's has no effect.
Flaxen: -/f Flaxen only effects red based horses. Two small f's makes a red horse have a flaxen mane. One or two large F's has no effect.
Sooty: Ssty/SstySooty darkens a horses coat. Two Ssty's make a horse darker then one Ssty, but how dark can be random. Two S's have no effect.
Pangare: -/p Pangare lightens a horses coat, particularly around the flank and muzzle. Two large P's will lighten more than one large P, but how much can be random. Two small p's has no effect
Silver: -/- The silver gene dilutes only black pigment but not red pigment, so only black based horses are effected. One or two large Z's dilute black hairs on black based horses. Two small zz's has no effect.
Champagne: -/- Champagne dilutes pigment, and makes the coat of a horse shiny. It also gives them pumpkin colored skin and amber eyes. One or two large Ch's turns a horse champagne. Two small ch's have no effect.
Tiger Eye: -/- Tiger Eye comes in two variations TE1 and TE2. Both act in the same way and can be mixed and matched (max two per horse). The Tiger Eye gene reduces the amount of pigment in the eye. One copy reduces pigment slightly and may be unnoticeable. Two copies boldy reduced pigment resulting in eyes ranging from orange to blue depending on genetics.
Mushroom: -/- Mushroom Gene
Satin: -/- The Satin gene causes the core of the hair to be hollow resulting in a fiber optic sheen. Satin is recessive and requires two copies to show
Chocolate: -/- Two copies of the recessive b TYRP1 mutation turn all black pigment into chocolate brown pigment.
Rainbow Riot: -/- The Rainbow Riot gene family. Rpl cuts plaid stripes into the pigment and also adds a random color stripe.
Kit Genes: Kitr/- Kit is one gene that makes many different patterns. Roan, Tobiano, and White are all types of Kit. One or two Kitr's turns a horse roan. One or two Kitto's turns a horse tobiano. One copy of Kitw(including w2,w3 etc) turns a horse white, but two copies of Kitw kills a horse. Two plain Kit's has no effect.
Splash: -/- One Sps will add bottom up white markings to a horse that look like it was splashed with paint. Two Sps's will exaggerate the effect. Two Sp's have no effect.
Splash 2: -/- PAX3 splash is caused by a different gene from normal splash. It is more aggressive and results in bigger white markings. It is normally homozygous lethal so only a single copy will ever show on the image. + is wild type and no splash, while C70Y is splash mutation.
Appaloosa: -/- One Llp adds mottling to a horses skin and invisible to full body white broken by polka dots of base color. Two Llp's adds the same but with no polka dots. Two Lp's has no effect.
Appaloosa Blanket Size: PATN1/- PATN1 is the most important gene for controlling the size of an appaloosa's blanket. One copy of ECA3PPATN1 will give a horse a large blanket while two copies will give a horse a near or total body white.
Rabicano: -/- One or two large Rb's adds white ticking to the flanks and tail of a horse. Two small rb's has no effect.
Frame: -/- One Olw frames a horses white markings with base color, but will only be visible with white markings to frame. Two Olw's kills a horse while two O's has no effect.
Ice: -/- Ice gene Little i is the null state and I has ice 1.
Phantom: -/- Phantom genes will produce shadow patterns on any KIT, Splash, or Frame markings, and sometimes on generic markings. They requires only one copy to show.