Dye mixer software for Procion MX dyes

Hobby dyer and computer programmer/engineer Olli Niemitalo of Finland has a wonderful online color-blending applet for the Procion MX range of dyes (and a few others), Dye Mixer. You can use it to pre-test color mixing effects in a variety of applications--see what the dyes you have on hand can be combined to create, see what a certain color will achieve when layered over an extant ground color, etc. If you are a dabbly, "painter"-style dyer (as opposed to a measured, "chemist"-style dyer), this might save you some headaches and wasted dyestuff in color-mixing experiments! Chemist-style dyers will be able to observe more measured, exact results in a hypothetical setting.

(Link posted recently to the DyersLIST, an email discussion group for dyers.)