1. Making the sign for "color": This is done by touching your thumb to your forehead and then bringing your hand down to your chin.
2. Then, make the sign for "pink": This is done by making a "P" shape with your thumb and index finger and touching your cheek with it.
So, you would combine these two signs together to sign "pink".
Important Note: There is no specific sign for the word "pink" in ASL. You always need to sign the word "color" before you sign the color itself.