As you can guess, I have many pairs of fingerless gloves myself (my hands are always freezing). I'm always tinkering with the design as to make it warmer. So one more way to warm them up is with thumb sleeves. I've also started making the edge of the glove come further up the fingers, as to keep more of your hand warm too.
I've added a color chart to my custom listing option for fingerless gloves so you can pick from lots of earthy colors and create your very own pair: