Here is a neat list of cat facts. Some examples:
Cats have more bones and skeletal muscles than humans
Cats can see green and blue
They have better hearing and nightvision than humans
Cats don't have a functioning collarbone, allowing them to fit through any opening bigger than their heads.
Cats' jaws can only move vertically
10% of a cat's bones are in its tail
Domestic cats are the only animals that can walk with their tail vertical

gradients

My kitty standing on one paw. Drawn on paper, scanned, and traced and colored in Adobe Illustrator.

logos

Paper kitty, made of tape and paper.

Kitty with a breakfast bar (see earlier blog posts)

Kitty in a cookie

Paint brush kitty (mostly just messing with Brush tool)

Graphite kitty (see above)

'Nyantan' with stylized cat silhouette ('Nya' means 'meow' and 'tan' is a diminutive)

Vertical 'fluffy' with multicolor letters

'Kittuhns' on a path with multiple colors (based on my suitemate's odd pronunciation of 'kitten')

'MEOW' with letters increasing in size, and cut apart with knife tool

collage

This is a collage of brightly-colored cats made to show off my brightly-colored plushie.

--Original images--
The image in the foreground. Other than removing the background, nothing was done to it.

Different cat pose. Removed background and heightened hue/saturation with selection tool to create a mask.

By Zachary Tirrell. Used color replacer with some blurring.


By eloH. Changed hue with mask

From apollo pet sitting Separated kittens and bed into 2 layers; used gradient map on kittens, touched up bed with clone stamp tool before using photo filter.

The cat doesn't show up, as this was mostly used for the background. The color was changed from the gradient map and photo filter on the image above it.

alterings

Smoothed out the edges a bit and brightened everything

inverted colors; lowered brightness and vibrance

Four images that seem to show off the cat's pinkness

Sitting cat with a new Alice in Wonderland background.
Kung-fu cats creating the illusion of perspective(with a starry background)

I think black helps bring out the cat's brightness.