For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

People

:bowtie:	😄 :smile:	😆 :laughing:
😊 :blush:	😃 :smiley:	☺️ :relaxed:
😏 :smirk:	😍 :heart_eyes:	😘 :kissing_heart:
😚 :kissing_closed_eyes:	😳 :flushed:	😌 :relieved:
😆 :satisfied:	😁 :grin:	😉 :wink:
😜 :stuck_out_tongue_winking_eye:	😝 :stuck_out_tongue_closed_eyes:	😀 :grinning:
😗 :kissing:	😙 :kissing_smiling_eyes:	😛 :stuck_out_tongue:

Ah, Regular Expressions, the expressions used regularly that no one understands. The magic bit of code that looks like someone mashed their keyboard. Once you know what you're looking at, it does start to make sense. A bit like most other code, when you think about it. That said, most developers don't know how to write their own regex:

The regex (cool sounding shorthand for Regular Expressions) I'll be going through is this: