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More like this: cobalt glass, cobalt blue and indigo.

Blue and more blue

Blue tilework, Topkapı Palace, Istanbul

A tight grouping of several small vases hides individual imperfections while creating a sculptural effect.

Blue cupcake

Cyanotype print made using the feathers directly on paper

another autumn by sumahli on deviantART

'Watercolours Blue Drops' from @Jeanette Lai Thomas Lai Thomas Kongsgaard Wallpaper & Decor is featured in the January/February 2014 issue of 'Inside Out' magazine.

Color Azul Cobalto - Cobalt Blue!!! Carolina Herrera Paisley Brocade

Mexican pottery/C. Barber

Pair of Antique Blown Cobalt Glass Apothecary Bottles w Orig Labels Tin Lids | eBay

Poison bottles