What is the color of the protein Ranasmurfin?
['Ranasmurfin, a blue protein from a different species of frog, displays a novel structure with a unique chromophoric crosslink.', 'Crystallization of Ranasmurfin, a blue-coloured protein from Polypedates leucomystax.', 'Ranasmurfin, a previously uncharacterized approximately 13 kDa blue protein found in the nests of the frog Polypedates leucomystax, has been purified and crystallized. The crystals are an intense blue colour ']
['Ranasmurfin is a blue protein.']
['Blue']