Cerulean
A calm sky
Cosmo
An ode to Metro
Cyborg
Jet black and electric green
Darkly
Flatly in night mode
Flatly
Flat and modern
Journal
Crisp like a new sheet of paper
Lumen
Light and shadow
Paper
Material is the metaphor
Readable
Optimized for legibility
Sandstone
A touch of warmth
Simplex
Mini and minimalist
Slate
Shades of gunmetal gray
Solar
A spin on Solarized
Spacelab
Silvery and sleek
Superhero
The brave and the green
United
Ubuntu orange and unique font
Yeti
A friendly foundation
Amazon
Super active
Bootstrap3
Plain and modest
Chubby
Blowin' in the wind
Flat
Smooth your mood
GitHub
Cool & friendly
Material
Shadow leads you to light
Semantic-UI
Default is good
Twitter
Connect everyone
