Accessibility could be better

[mrwilson]

Using colour as a way of conveying information doesn't work for certain kinds of colour-blindness.

• Use icons instead of just colour (test with https://www.toptal.com/designers/colorfilter)
• Ensure that the generated markup that this project controls works with screen readers.

[alshapton]

Would a TOML file of colours mapped to ADR statuses be in order here ? If so, I'm quite happy to take this on. I like add-viewer, and would like to see it have more functionality. I can add features if they are called for.

[mrwilson]

@alshapton Happy for you to raise a PR for it! A mapping from status to both colour and icon would be great

[alshapton]

PR raised for :
colours
icon mapping
Improved screen readed compatibility
README updated to include information as to how to use the new functionality
CHANGELOG file created to track previous releases' changes