Update materials listing row colors, as per advice of Ethan:    [#78284436]
Update materials listing row colors, as per advice of Ethan:    [#78284436]

https://www.pivotaltracker.com/story/show/78284436

concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse