Scarlet

Sure, "scarlet" is an awkward word to like. A color is very specific and can only be used to modify a noun, so obviously it cannot be inserted at random into any conversation. But the word "scarlet" gives me a good rush of emotions and imagery. I immediately think of a pure, vibrant warmth mixed with a subdued, dark, and velvety foreboding desire. It gives me the impression of blood (which is life), or of naughty acts only committed under the most guilty and sensual consent. Plus, it's just a really pretty color.