joining colours with no blips
That is just how I do it, it's an alternative method to do it. Actually I don't use to avoid the "blip" of color that often.
Refer also to Jane Eborall's page here: www.janeeborall.freeservers.com/noblips.pdf
and Frivole's blog post here: leblogdefrivole.blogspot.com/2013/09/something-new.html