Implement auto color scale logic

[designmatty]

In the base theme create an object named something like colorScale.
Any key: value in here will automatically create a color system based on the passed value.

ie:

colorScale: {
    red: '#f00'
}

would output:

colors: {
   red100: ...
   red200: ...
   red300: ...
   red400: ...
   red500: #f00
   ....
}