The phrase "a blue elephant" is correct and usable in written English.
You can use it when describing an elephant that is blue in color, either literally or metaphorically.
Example: "In the children's story, there was a blue elephant that could fly and spread joy wherever it went."
Alternatives: "a cerulean elephant" or "an azure elephant".
The watchdogs — led by a teddy bear, another sock monkey and a blue elephant wearing pince-nez — are all business.
"More and more, the lack of a woman member is just a blue elephant in the room".
In "I Love You Dude," a blue elephant wearing large brown shoes begins life on a wall of graffiti, artist unknown.
Even though I'd explained it several times in the last few weeks, only my oldest child, Sam, really remembered what the primary meant (and when I asked him to name some of the differences between the Republican and Democratic Parties, he offered that the Democrats were represented by a blue elephant — although he was able to correctly identify his grandfather as a Republican).
Stumpy, a blue elephant was the mascot for the 2011 World Cup.
The mascot of the PHP project is the elePHPant, a blue elephant with the PHP logo on its side, designed by Vincent Pontier.
At the most recent session, Pampers' official mascot in China -- a diapered blue elephant named Bang Bang, or Help Help -- played with children and touted special deals.
Consider Peanut, a dark blue elephant, which sold for $5 in 1995.
HelloSpoon also looks like a big blue elephant, making it particularly adorable, especially when it says things like, "Are you ready to have fun?" Yes, HelloSpoon, I am.
At issue is a depiction of a red and blue elephant, emblazoned with the shape of the state of Texas, that is showcased on the home page of the official Republican site, www.TexasGOP.org, and used on party literature.
But when Mary finally spots a little stuffed blue elephant with "round, pink cheeks just like the elephants Mary and her mother had carefully painted on the walls of her brother's room," only to see it snapped up by a grown woman, Mary reaches into a well of determination.
