Every Ionic project comes with a set of pre-installed colours. This is how those colours are programmed :
* Navigate to the project/src/theme/variables.scss folder in your Ionic project.
* There will be a variable named $colours here that will hold the names of the various colours as well as their hexadecimal colour codes.
* Color codes for default colours can be changed, and new colour names and hexadecimal codes can be added.
