Fix color API

[DataStrategist]

OK, there's been some breaking changes made to how colors (and by color here I mean background) work, so let's just redo the whole API. Let's do the following:

• gradient_box should use generic but pleasant pastel red/yellow/green for denoting the state. Eliminate the reliance on bootstrap's danger, success etc terminology
• all other buttons will have their structure changed to where color actually means color.
• color's default value will be bootstrap's primary color
• Create another input whereby we can also control the text color.