In case you don't know..i started using sharpie pens at the end of 69. over the years from 1970 to 1999 there were only 5 colors available. (Black, gray, blue, red, green). That's it. See Sharpie(Sandford Corp) and Bic (BIC corp) are office mediums not art. Around the beginning of 2000 they introduce the multicolors that they still offer today. I have seen other artists work sharpie in with their mediums..some mediums it can work..others well forget it if your trying watercolors..sharpie rich color stands out. It is wild to say that i have been working with Sharpie for over half a century! Stay Tuned!