Leaderbord headers fixes

Author: kkartunov

src/shared/components/Contentful/ContentBlock/themes/TCO19.scss

@@ -78,7 +78,7 @@ strong a {
     th {
       @include roboto-regular;
 
-      color: #808080;
+      color: #2a2a2a;
       font-size: 15px;
       font-weight: bold;
       line-height: 25px;

src/shared/components/Contentful/ContentBlock/themes/TCO20.scss

@@ -94,7 +94,7 @@ strong a {
     th {
       @include roboto-regular;
 
-      color: #808080;
+      color: #2a2a2a;
       font-size: 15px;
       font-weight: bold;
       line-height: 25px;

src/shared/components/Contentful/ContentBlock/themes/general.scss

@@ -122,7 +122,7 @@ strong a {
     th {
       @include roboto-regular;
 
-      color: #808080;
+      color: #2a2a2a;
       font-size: 15px;
       font-weight: bold;
       line-height: 25px;

src/shared/components/Leaderboard/LeaderboardTable/themes/tco20.scss

@@ -191,7 +191,7 @@ $table-bg-hover: #f5f5f5;
   .col-fulfillment,
   .col-challenges,
   .col-points {
-    color: #7f7f7f;
+    color: #2a2a2a;
     font-family: Roboto, sans-serif;
     font-size: 14px;
     font-weight: 500;