Brushes are per project; they will reset to a default set every time you create a new one. So, currently, the only way to preserve a brush (and its color) set-up is to continue to add canvases to a project (you can do that in the Organizer view with document icon with the + sign).
I don't know whether you're already chosen your colors, but you could create a project-specific library in Capture CC with whatever colors you want to use, and share that library with your team so it will be available across iPads (if you have a team of people each using their own).
Hope that helps.
Thanks, that helps.
I experimented with Capture CC and getting colours from previous pictures, and that worked great.
I also found the "History" selection in the colour picker, and that is very useful too.
Oh good. I was going to mention the Color History and for some reason just didn't. Glad you spotted it. (Be careful about deleting colors from it; it's all or none.)