Epic Tags are harder to see in JIRA Agile 6.3.7

Epic Tags in the backlog (Scrum board - Plan mode) have become much harder to see in JIRA Agile 6.3.7 as they are highlighted with only border and text colors, as compared to solid background color in JIRA Agile 6.3.0.2.

Users may find it hard to differentiate between different epics and would like to have an option to use or configure Epic Tag background color.