Disclaimers Edit

Not everything mentioned in this guide is recognized as such by major cat breeders, show-hosts, and other authorities. I'm supplying all information I know of, regardless of if it is "registered" as legitimate. If you have questions regarding the validity of anything listed below, please feel free to message me.

Please note that the "colors" seen here are just technical names for these patterns. The actual hues and saturations of each cat's pelt varies wildly, making each cat unique regardless of their "genetic identity". For example, a "brown tabby" (which is technically black, except tabbied) can be anywhere from rich, dark chestnut brown to a paler caramel color with black stripes. It all depends on the exact saturation of each pigment, and underlying genes related with their blood purity, their health, and any "carried" traits.

Lastly, this guide is NOT intended to tell people how to create characters, or how to roleplay! It was created for the sole purpose of easing the process and helping people to make their OCs more realistic. If you feel like it, you're free to violate any of the "rules" listed below- I won't care, and neither should anyone else but you. (However, I DO suggest that you at least give this guide a read and consider any things deemed "unrealistic" about your OC or their relatives.) Thanks!

Body TypesEdit

The SpectrumEdit

Cat Body Types are on a spectrum. They range from cobby, intermediate, and foreign. There, of course, are variations of each type. I (Yellowfang is Salty) own a cat that is semi-cobby, while my other cat is intermediate.


The most popular example of a cobby cat that I can think of is a persian. They usually have snub noses, a stocky-ish build, and various breathing issues due to their strange muzzle shape.


Intermediate body types are the body types that pretty much all forest-born cats should be. They're pretty much mutts. They have an average build with slightly elongated muzzles. Example: Domestic Shorthair.

Foreign (Oriental)Edit

Foreign body types should NEVER be used in roleplay, since most foreign breeds are products of selective breeding. They usually have big ears and eyes, a narrow 'triangle' face, and very.. slinky-like builds.

Fur Colors Edit

In the cat world, there are two basic colors of fur- black and red. However, we get special pelts like tortoiseshells, tabbies, and points of all sorts of colors through derivatives and variations in gene distributions during a kitten's development.

There are 4 core types of pelt patterns, with some overlap: The solid, the tabby, the tortoiseshell, and the point. (We'll get to overlaps later.) First, let's cover solids.

Solids (and variants)Edit

Within the color of "black", there are two 'color lines' it can follow: Pure, and Diluted (sometimes called "maltesed"). Pure black can be further derived as the rates of eumelanin (black pigment) in the fur get less dense. If enough eumelanin is missing, Black can lead to the colors Chocolate (a dark brown) and Cinnamon (a bright reddish brown). Meanwhile, diluted Black (or more commonly known as "Blue") can also be 2 lighter shades, depending on the distribution of eumelanin. Blue can become "Lilac" (aka Lavender or Frost) and "Fawn" (aka light lilac). There is also an uncommon added tint to dilution known as "caramelization", but so far it is only seen in Blue and Lilac.

On the other side of the coin, we have Red. Red doesn't have any variations in its pigment (known as phaeomelanin), so it only has one type of red- red. The diluted form of red is cream. Caramelization can also be seen in red cats, in a rare color know as "apricot". (In case you're wondering- yes, red-colored cats can only be tabbies. They can be bred to have virtually-invisible stripes, but the tabby gene is still there.)

To help visualize all this, here's a labelled gallery of all colors mentioned!

  • Solid Black
  • Solid Chocolate
  • Solid Cinnamon
  • Solid Blue
  • Solid Lilac
  • Solid Fawn

"But author, what about white cats?" I'm glad you asked! However, we'll answer that question later in the guide.



Unsurprisingly, there is a tabby version of every color (including caramelizations!) I've listed above.

To make it easier to consume, I'll create a table to demonstrate each of the pelt types with their corresponding tabbies.

Color Tabby Version
Black Brown Tabby
Blue Blue Tabby
Chocolate Chocolate Tabby
Lilac Lilac Tabby
Cinnamon Cinnamon Tabby
Fawn Fawn Tabby

Now, here's the table for red.

Color Tabby Version
Red Red Tabby
Cream Cream Tabby

To help visualize all this, here's a labelled gallery of all colors mentioned!

  • Brown Tabby (Black)
  • Chocolate Tabby
  • Cinnamon Tabby
  • Blue Tabby
  • Lilac Tabby
  • Fawn Tabby
  • Red Tabby
  • Cream Tabby

Easy enough, right? Now, let's move to patterns.


There are 4 basic types of tabbies: Mackerel, Classic, Spotted, and Ticked.

Mackerel tabbies are the wild-looking tabbies with tiger-like stripes. They also have a derivative known as "broken mackerel", where the stripes are 'dashed' instead of long streaks along the body. This derivative is also fairly common. In general, this tabby is not breed-restrictive. They come in all colors within the table, and are incredibly common.

Classic tabbies are the fun tabbies with blotchy swirling pelts. They are very common, especially in Britain. Their derivative is the breed-specific "marbled tabby" (aka "clouded"), which is more elegant and whimsical in its markings and has a 'clouding' effect. Unfortunately, marbled tabbies are restricted to wildcat hybrids (such as Bengals). Classic tabbies come in all colors listed above (except for the breed-specific variant).

Spotted tabbies are the oddball tabbies with coats covered in spots, much like a cheetah. While it's not recognized whatsoever in the professional cat world, the derivative of spotted tabbies is "rosetted" in style, much like a leopard, and is restricted to wildcat hybrids (such as Bengals). They come in all colors (except for the breed-specific variant).

Lastly, ticked tabbies are the sandy tabbies with a "speckled" appearance. Specially-colored bands on their hairs cause a rippling gradient effect of their respective fur color. Ticked tabbies have no known derivatives. They are also breed-specific, as true ticked tabbies can only really be seen in Abyssinians or Somalis. They typically come in black (portrayed as silvery) or red (a bright flame red).

To help visualize all this, here's a labelled gallery of all patterns mentioned!


Why are tortoiseshell cats always female?Edit

Here's where things get a little more complicated.

In order to truly understand tortoiseshells, we'll need to get into the science of chromosomes and how they relate to fur colors.

Within a female cat regardless of their color, there are two X chromosomes. These X's each control the color(s) they receive from their parents- one X from the mom, and one from the dad. However, within a male cat, there is only one X- the other chromosome is a Y. For this example, only X chromosomes hold color.

Tortoiseshell cats are a combination of both black and red (or a combination of their derivative colors, listed above), which is possible if a kitten receives different X colors from their parents. This is made easily possible for female cats because of their natural double Xs, and it is also the reason why almost all tortoiseshell cats you see are female.

However, for males it is different. A vast majority of the time, a male kitten will only receive one color because they only have one X to spare- either a color from mom, or from dad. In the rare case of a freak accident, male tortoiseshells ARE possible, don't get me wrong - however, any male tortoiseshell born would not only be extremely fragile from birth, but it would also be sterile. These are both because of the upset chromosomes within them- they are forced to carry 3 chromosomes (XXY) instead of 2 (XY), which makes reproduction impossible.

Now that we have the sex issue out of the way, let's move on to the actual mechanics of torties!

Two Types of SplotchingEdit

x brindled + patching x WIP x

Traditional TortoiseshellsEdit

A traditional tortoiseshell is a combination of solid black (or any of its derivatives) and red. Here is a table of all tortie color combinations using red (aka totally saturated colors).


Diluted Tortoiseshells

This is the same as a traditional tortoiseshell, except both colors are diluted instead of full-force.

Note that any non-breed-exclusive tabby pattern can apply







True AlbinosEdit




Two Colors, Three LevelsEdit

silver + gold ;; chinchilla (shell) , shaded , smoke

The "Inhibitor Gene"Edit

The inhibitor gene controls 'smoke' and 'silver tabby' pelts. this gene takes away or lessens the 'yellow' pigment in cat fur that leads to the normal core 8 colors


Eye ColorsEdit


Fur Lengths + TexturesEdit








Miscellaneous mutationsEdit


End NotesEdit

(NOTE: This half of the page has no relation to the content below, so please do not connect them. All info covered below will also be mentioned in future edits. Thanks!)

The Basics Edit


The problem with roleplaying is that roleplayers barely use genetics correctly. I will teach you the basics of genetics.

Please note, canines and cats do NOT breed. The same with big cats. All hybrids (in that way) will be considered jokes to most people.

Dominant Genes Edit

Dominant genes overpower recessive genes, and are rarely paired with recessive genes (See hybrids).

Fur Colors Edit

Examples of Dominant fur colors: black, brown, orange, and white. The colors that are recessive are: Burmese color, Siamese, non agouti, Chocolate, cinnamon, dilute and non white.

Eye Colors Edit

Eye color generally depends on fur color.

Black fur: Yellow or amber.

Brown fur: Usually green, sometimes yellow or amber. RARELY blue.

Orange fur: Usually green, sometimes yellow or amber.

White fur: Green, yellow, amber, odd-eyes, and blue.

Multi: Depends on the dominant fur gene.

Recessive Genes Edit

Recessive genes are weak, and are mostly covered by Dominant genes. In some cases they will show, and sometimes with Dominant genes, producing a hybrid.

Fur Colors Edit

Examples of Recessive fur colors: Burmese color, Siamese, dilute, and cinnamon.

Eye Colors Edit

Once again, they depend on the fur color.

Burmese: Mostly yellow.

Siamese: Blue.

Cinnamon: Orange or yellow.

Dilute: Depends on fur color

Other Details Edit

Cats are RARELY black with gray stripes, AND NEVER black and red, purple, etc.

When making an OC's offspring, make a Punnett Square.

In order for the Punnett Square to work, you must have both parents.


x R r
r Rr rr
r Rr rr

You can use any letter, but uppercase or lowercase matters.

Uppercase: Dominant gene (RR)

Lowercase: Recessive gene (rr)

Uppercase & Lowercase: Hybrid (Rr)

Side note: Mutations Edit

Before you give your cat a mutation, do research on it and make sure it's not lethal. Also, mutations are extremely rare, so please don't give your OC one.

Examples of a non-lethal cat mutation: Heterochromia (odd-eyed) Cornish Rex cat (short and curly fur, large ears, large eyes)

Example of a lethal mutation: Two-faced (Can be lethal in some cases)

Closing Statement Edit

Genes and Punnett Squares are fun once you get them, and using correct genetics will make it easier to create OCs. Cats NEVER and I repeat, NEVER breed with wolves, foxes, big cats, you get the point.

I hope you have fun with cat genetics!