Text styles add colours, which convey meaning not available to non-visual or colour blind users.

[msayoung]

Our default text styles offer these options:

• Alert info , warning, failure, success
• Callout danger, callout success, (and others)

These add a coloured outline or background making these stand out visually. The colours also suggest meaning (green - good, red - danger).

There is no text alternative for these styles meaning that the text won't stand out to non-visual (eg screen reader) users. Colour blind users may not be able to distinguish one from the other.

This could (or should ? ) be dealt with in content - for example adding "Warning:" to the beginning of the text.

Thoughts?

Related #531

[markconroy]

There's a grand auld conversation going on over here along with a nice little PR.