Recently Ai added Recent Color sections (the request: http://illustrator.uservoice.com/forums/333657/suggestions/44772598) to Swatches and Color panels (with an ability to disable them — thanks!)

Some choices these remember are more important than others — but not enough to be included into the actual Swatches panel. For example, I have a Magenta global color I sometimes want to be added into certain projects, when needed. Pinning it in Recent would allow me to quickly grab it, without dancing with Persistent panels.
Or I could have pinned a brand color of a client I often work with, and have it there.

I’d like to have an ability to hold Opt/Alt or Shift and pin a recent chip with a click.
There is a second related request, about deleting one/all chips, so it can use the other modifier — http://illustrator.uservoice.com/forums/333657/suggestions/50279421