Sometimes I do. I recently finished a top made of green stars, and named it "Oh My Green Stars". I have made one I named "Australia Remembered" because the colors in it remind me of Australia, where we used to live.
I named one "Red Beans and Rice" - it's colors are reddish brown, red and white, and I threw in a bit of yellow. Not much yellow, just enough to consider it a taste of "corn". Another I made for my nephew who lives in Alaska "Alaskan Nights" - it was made in various shades of blue and a touch of reddish, greeny, and yellowish "aurora" bits.
It's kind of fun to name them. My sister made one of red and orange and pink with black sashings and called it "Road Rage".