Probably everyone of us have struggled with generating a color scheme for a client. We have this problem from time to time. There are some online tools which solve this issue.
Colors.co – a nice tool to generate color palette. You can lock colors and generate new ones until you are satisfied with the result.
Adobe Color CC – a nice selection of color palettes, you can edit and change them, but I find it quite hard to generate new palettes. I like the ability to see the most popular ones.
Material Colors – a good place to start for some bright colors.
Toptal Patterns – place to start looking at patterns
Brand Colors – ever wanted to know what colors are used by AirBnb or Amazon? Here is a list of official brand color codes.
The Days Color – color palettes for inspiration.