ChiefWiggum

Feature: Support Alpha channel in colours

2

Hi there, it would be great to have the option to pass in a _background_ or a _text colour_ that supports alpha channels with the [RGBA format](https://caniuse.com/#feat=css-rrggbbaa) `#RRGGBBAA` or `#RGBA`,...

We are currently looking into using ChargeBee for our subscription business, but the lack of maintenance of this package does not really fill us with confidence. Looking at the commits...