Okay, some hints on how I am changing the material design palette. Every H* RGB color-space model has a bias in two components of the model. In HSL the strongest bias is the S part of HSL.
In HSV(HSB) its the V or brightness that has the strongest bias with the S part of HSV having the second highest bias. Basically I am taking what Google started as far as tuning primary colors based on that we only probably want white and black pegging at either 0 or 100 on S and V and just refining that and adding some more colors to build it out.