Color Mixing Tools includes 3 tools: Color2Drop (a program to convert RGB, Lab or Munsell HVC color coordinates into paint mixing recipes) Drop2Color (a program to visualize the color of mixed paint recipes) RS2Color (a program to visualize the color of reflectance spectra) http://zsolt-kovacs.unibs.it/colormixingtools Reading this I see E'tac is here as well: EFX500 by E'TAC (all colors: EFX 501-513 (2007) + 12 colors EFX HS (2009)) Some bases have changed color and formulation over time: these bases can not be mixed correctly anymore. EFX500 by E'Tac - 25 spectra calculated at maximum saturation when the paint is used transparently Also Schmincke, Golden and others. There is also web and mobile version. You can find createx on mobile version and Vallejo. Web version: https://sensuallogic.com/paintmaker you can put picture on that site and then click on the color which is of your interest and you get recipe for that color. I was playing around with it for few minutes without being a member. I didn't need to use calculate recipes, cause as soon I clicked on color on the picture I got results in parts.