https://i.ytimg.com/vi/7v2yC3GyDHU/hqdefault.jpg

Homepage: http://bootstrapbay.com
Source Files: http://github.com/bootstrapbay/tutorials

In this installment of our Bootstrap 3 tutorial, we add some custom CSS modifications to the common Bootstrap elements including the navbar, navbar links and buttons.

Below are some helpful tools to pick colors for your theme.
Adobe Kuler: https://kuler.adobe.com/create/color-wheel/
Color Scheme Designer: http://colorschemedesigner.com/

source