THE OUTLINE 

The outline acts as a metaphor here. It suggests a frame. It incorporates and roots the portrait in the traditional art of portraiture. It also represents the contemporary aspect of the painting in its bold and vibrant expressive character. 

The color choice is somewhat intuitive. I usually decide on the color at the very last stage of the process and just try to find one that works well. Hopefully, by doing both - adding a narrative and emotion associated with that certain hue, and working on a strictly decorative level as well. The way I think about the outline color is by choosing one that will either highlight the colors already present in the portrait or contrast them.

My hope is that the abstract form of the outline adds an emotional weight and highlights the human subject by drawing attention to the portrayed face they frame.