[Solved]-Angular2 ng2-chart customizations?-Chart.js

I couldn't find the best answer to your first question. However you can define multiple datasets with no intersection and use different colours (see the point 2) for that one.

http://valor-software.com/ng2-charts/

For the second one when you define colours, as you are already doing it in your code:

chartColors: [{
    backgroundColor: 'rgba(25,10,24,0.2)',
    borderColor: 'rgba(225,10,24,0.2)',
    pointBackgroundColor: 'rgba(225,10,24,0.2)',
    pointBorderColor: '#fff',
    pointHoverBackgroundColor: '#fff',
    pointHoverBorderColor: 'rgba(225,10,24,0.2)'
  }

The last number in rgba is the opacity. For having different colours the option is to define multiple datasets, otherwise it randomises the colours and you won't get mixed ones. A plunker here:

http://plnkr.co/edit/9PckMZiDYZjRz1PA0Suq

For the last question regarding getting the value of x-axis, look at the event which is logged to console on bounded events.