tl;dr You conceptually* should be able to put those customized values into colors.h for OS6 and give them customized names. You’re expanding the OS color list to where you can then just put the color into the style under the custom name. Similar should be possible with all the props, but I may be mistaken. You’d just need to be sure any given prop either has the list or feeds from colors.h and then respective color wav’s in the common folder structure so they are spoken. I know there’s more than one of us here that’s done this with the old OS. 
Disclaimer: *At least that’s what I think/interpret without actually having done or tried it in the newest OS yet. I did this with OS5.7 when I put in “KatarnBlue” , “KatarnOrange”, YunYellow", and “QuRahnGreen” as custom shades.
Post the idea into the OS7 Feature Request topic. I’d love to see what the consensus is on this and the other stuff as to color values.
Off-Topic as far as Graflex and Obi blues but if anyone wants to research the Kyle color bit this is the old discussion.