increased text contrast to make text more legible

lms/static/sass/base/_variables.scss

@@ -61,6 +61,8 @@ $baseFontColor: rgb(60,60,60);
 $lighter-base-font-color: rgb(100,100,100);
 $text-color: $dark-gray;
 
+$dark-trans-bg: rgba(0, 0, 0, .75);
+
 $body-bg: rgb(250,250,250);
 $container-bg: $white;
 $header-image: linear-gradient(-90deg, rgba(255,255,255, 1), rgba(230,230,230, 0.9));

lms/static/sass/course/layout/_courseware_header.scss

@@ -148,7 +148,7 @@ header.global.slim {
     float: left;
     font-size: 0.9em;
     font-weight: 600;
-    color: #777;
+    color: $lighter-base-font-color;
     letter-spacing: 0;
     margin-top: 9px;
     margin-bottom: 0;

lms/static/sass/multicourse/_account.scss

@@ -268,7 +268,7 @@
         @include transition(color 0.15s ease-in-out);
         display: block;
         margin-top: ($baseline/4);
-        color: tint($outer-border-color, 50%);
+        color: $lighter-base-font-color;
         font-size: em(13);
       }
 

lms/static/sass/multicourse/_dashboard.scss

@@ -561,7 +561,7 @@
       float: right;
       display: block;
       font-style: italic;
-      color: #a0a0a0;
+      color: $lighter-base-font-color;
       text-decoration: underline;
       font-size: .8em;
       margin-top: 32px;

lms/static/sass/shared/_course_object.scss

@@ -71,7 +71,7 @@
       }
 
       .meta-info {
-        background: rgba(0,0,0, 0.6);
+        background: $dark-trans-bg;
         bottom: 6px;
         border: 1px solid rgba(0,0,0, 0.5);
         @include border-right-radius(2px);