The following question has occurred to me several times when the topic of Glamdring glowing in the presence of orcs has come up in the movie sections. First, some quick background. We all know that Sting and Glamdring (and Orcrist) are elven blades from the Elder Days and glow in the presence of orcs. On a number of occasions in LOTR Sting is described as glowing blue when orcs are about. (Sometimes, Sting is merely described as glowing without the color mentioned.)
My question is: Is Glamdring ever described as glowing blue when orcs are near? Certainly Glamdring also glows in the presence of orcs, that is described a number of times; but, does it glow blue? Or is the blue color specific to Sting? I have done a quick look through the LOTR (and The Hobbit) and I find mentions of Glamdring glowing, but the color blue does not seem to be mentioned. I may well have missed or forgotten an occasion. If you know of a time when Glamdring glows blue please give the specific passage from the books.