If you're looking to inject a bit more color into your phone then you could do a lot worse than to install the Colored Lanes theme on your device.
Colored Lanes is a theme that will turn your mobile phone into a wonderland of color. The theme is compatible with Nokia 5530 XpressMusic, Nokia 5800 XpressMusic, Nokia N97 and Samsung i8910 Omnia HD.
Colored Lanes adds a gorgeous background wallpaper of a running track with a series of colored lanes (not surprisingly). It also tweaks the menu icons and battery/coverage indicators on the home screen, giving them a splash of color too.
Aside from this, the theme also tweaks the Symbian menu systems, adding some smart colored icons, along with some cool psychedelic effects.
It's certainly a feast for the eyes, but Colored Lanes isn't recommended if you're suffering from a migraine!