I very much see a yellow trend in your feathered friends , very nice birds. I have never had any luck with canaries, my last pair that where actually nesting got eaten by a carpet python , and now that I have Cuban finches I am not so keen to add yellow canaries. My pair of canaries wheren't yellow, the male was red factor and the female was black and white, not common colours around here at all.
my light unit has blown on my fish tank so I'm waiting on a replacement and with the canaries and now kakarikis breeding, I've been mainly focussing on them recently .