One of my favourite colour combinations, always connected in my mind to Tri-ang Toys and anything tin really...
Cerulean (sir-roo-le-on) is a handy word for something that's not quite turquoise, not quite sky blue despite its probable derivation from the Latin caelum = sky.
Vermillion - something deliciously bright that's not quite scarlet, not really orange. (I might be stretching it sometimes, I know.)
Other Great Colour Combos here
[Images are leaves from my scrapbook. Forgive me not attributing them.]