Being a criative coder and also painter, is always a problem to map digital color creations using RGB color system to the physical painting canvas.
The artist pallete usually has 100 or a few more colors, nothing like the 16581375 RGB colors. Color paints use a discrete color system, called Munsell.
For example, Turners Yellow as a hue of 1.5Y, a value of 7 and a chroma of 9 in Munsell system and a corresponding RGB value of (215,166,59) using the mapping application in http://pteromys.melonisland.net/munsell/
Based in the previous method, I made a list with all the RGB values of the painters pallete, and with a simple calculation of the smaller tridimensional distance between the RGB codes is possible to find a similar color paint to a RGB color. The results seem pretty good, but you must have in mind that not all artist colors have a corresponding valid RGB value.
You can try in https://www.openprocessing.org/sketch/960400