Merge pull request #766 from CityOfBoston/develop

DIG-5280 Optimistic blue color change

stylesheets/variables/_colors.styl

@@ -13,7 +13,7 @@ $freedom-red-dark = #d22d23
 //
 // It’s also the preferred variant for some elements’ hover background color, and
 // can also be used in decorative cases.
-$optimistic-blue-light  = #288be4
+$optimistic-blue-light  = #1871bd
 
 // This became an option because the $charles-blue on $optimistic-blue-light failed accessiblity contracts
 // -SR means screen readers