Chalk paint is not like latex paint from Home Depot. Rather than picking out paint chips and having one of the employees mix a can for you - chalk paint comes pre-mixed.
In most cases - if you shop around enough - you will find a color that is close to the one that you are looking for.
Most professionals master the art of creating custom colors from pre-mixed chalk paint. It is a painstaking process of measuring, painting and drying. The results can be dramatic. A deep purple can be made with Red and Blue. White can be used in different ratios to achieve a number of different looks.
Whether you are selecting from Annie Sloan Chalk Paint colors, Fat Paint, General Finishes or House&Canvas - mixing your own custom creation to suit your room can be a satisfying project!