We have text colour options noted as a noted enhancement too :). I've attached a screenshot of the current Weka backlog at the bottom of this comment for you to have a look at. 

The Weka editor was built as part of the Talent Experience Platform release, at that point there was a decision to not support the Atto editor in the newer parts of the product, like workspaces and performance activities. Aside from enabling mobile support for the content created, we've chosen to prioritise effort to a single editor. That's given us scope to continue to improve Weka like adding the file formatting improvements and layout blocks feature, both of which appear as part of v17. 

Hope that answers it for you, yell out if you have any further questions though. Thanks!