https://solidity.readthedocs.io/en/v0.5.3/style-guide.html
- Art
- Canvas.sol - A 500x500 pixel canvas with ownership functionality.
- Regex - Built using solregex tool: https://github.com/gnidan/solregex
- IsHex8RGBA.sol - Checks if a string is an 8-digit hexadecimal RGBA colour.