Jira issue label colors should have higher contrast

Problem

Currently there is a low contrast ratio between the background colors of the labels and sidebar.

During the first iteration of the Jira issue list, a Jira issue detail view didn't exist. At the time, we selected a color for the label that worked well for the list and did not take into consideration how the labels would look in the right sidebar of the details view.

Proposal

• Use Atlassian's blue 0052CC for the labels with white text.