Use color as a way to highlight priority
This feature has been added as of April 2016
John Smith commented
It is important to be able to quickly scan visually (without needing to read anything) for what is of how high priority.
In practice this could be used as "how often to review" (daily/weekly/bi-weekly/monthly) using color (e.g. in the Someday/Maybe list).
As well as quickly see what is urgent today, without needing to drag and drop things up and down the page.