I have been playing around with skin tone in acrylics. It can be so frustrating sometimes!!!! I did this painting of my grandparents and little brother ( he is now 26 so this is an old pic) using a blue under painting which I found was helpful. I then mixed red oxide with titanium white, naples yellow and a dash of naphthol red. For shadows I used my favorite color, payne's grey. I still have a lot to do especially with my grandpa's face but I like it better than my previous portrait in terms of blending. I found it was very helpful to use acrylic retarder with my paint which slows down the drying process of the acrylics. I also LOVE using a dry brush to blend the wet paint around. This was very helpful in making sure my blending was a little more gradual. Well I am off to paint some more! Have a good day!