portrait painting

I have been drawing a lots of colorful portraits, where i mix different kind of colors all together. I realized that my choosing of colors weren't right. I was choosing very different colors so i need to figure out some good combination of colors to paint portraits of different moods. apparently different colors can give you the sense of different colors. For example, redness can give anger or psychotic look. Bluish color gives a sad and melancholic look and sometimes cold look too....

So, now i am watching a lots of videos on color theory. There aren't enough good videos for free but thats what i will have to take in.
This the first practice of that.
Enjoy.

Here are some process shots:

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