Not really. There's a border around the gauges in the normal view, and by default they change color based on your selected driving mode (Eco=Teal, Normal=Blue, Sport=Red). I believe, and I'll try to confirm, if you select the "Custom" driving mode, then you can set the color of the border as you choose.But the gauges themselves are not modifiable.
The documentation on this stuff is not particularly good. In fact I find the entire owners manual to be fairly poor. But then I'm just not accustomed to the old-fashioned way of thumbing though paper books in the hopes of finding the tidbit of info I want. I much prefer searchable PDF files (no, not fond of iThing apps either, but that doesn't matter because there's no searchable owners manual there either).