How to color grayscale pictures

Have graycale pencils or paintings lying around without color? have no fear!
behind the cut is a simple process and how to color like this tutorial!

The rest of the dancers

Well, that's that! I like how the flat planes interact with the flesh parts, I wonder what else I can apply this to?

Fandango with shawl

It was the first time I saw fandango dancers, They were soaring like eagles
trying to do something with flat and painted parts, maybe because of my love of klimt!

Tigers

Hi! have some tigers, with soft paws. -C

Challenge: Noir

A hardboiled lady detective encounters a murder -C

What's that behind her?

Challenge: Journey to the West

I tried to make them look weary from the travels. -C

Journey to the West

Details:

Illustration Friday: Bottle

Hello, this is Cristina, I will be posting art here and doing art challenges!
You can also issue a challenge here!(creative challenges please!)

most pertinently, doing Illustration Fridays:
(http://www.illustrationfriday.com/)