I have recently published my "NowIcons" to the play store. This set was inspired by the Google Now/Card UI. It is clean, colourful, and brings life to your home screen.
A great add on to the theme is my free Now UCCW skin. Also available in the play store. This set keeps with the icon style and the colorful nature of the theme.
If you're looking to take a break from dark screens and add some color to your life and home screen, check them out, you won't be disappointed.