its a refreshing change, awesome work
As an aside. I have a nominal post in my head contrasting the development and refinement of a colorscheme like this vs the infamous 41 shades of blue. There is room for refinement and testing in design, but I think it has to be coupled with a clear design goals and opinions.
It would be very interesting to learn about the methods you used to create this.
Are you planning to create a palette with more shades? Some time ago I needed lighter Tango tones and created this extended palette: http://emilis.info/other/extended_tango/