Red. I recently saw a Zentangle tile that someone in a Facebook group had drawn in red. That was the first time that I‘ve seen a completely red tile. I thought it would be an interesting challenge to try my own. Shading with regular pencil looks a little strange, so I decided to try a red colored pencil. I chose a color that was a bit darker, and I think it worked very well.
Zentangle drawing done with Micron pen on Strathmore Vellum Bristol . Tangles: Fescu Flee Sharalarelli Trio