One wall in the new kitchen in River Drive ca.2002 had to be cobalt blue. I dunno why, mine is not to reason why. Aitch said it must be cobalt blue and so of course it was.
So when the post-Aitch renovations happened ca.2012 in Elston Place, there had to be some blue. I made the scullery and laundry doors blue. I looked for cobalt blue, but this was the closest I found.