After a summer of turquoise blues and the greige craze, dark blue nail varnish is back and is the new black for autumn 2010. So get ready to dip into the dark side with our two top choices for beautiful blues on any budget.

Estée Lauder’s Pure Colour Nail Lacquer in Blue Dahlia, £12, is perfect for those of you who don’t want to go too dark but still want trendy tips. This blue shade makes nails appear sleek and sexy and gives that gemstone sparkle.  Speaking of gemstones, Rituals Nail Varnish in Sapphire Moon, £7.90, uses actual red rubies in its varnish for a brilliant shine. Plus, their goof-proof flat brush makes stunningly perfect nails a sinch!

By Christina Caicedo