revert heatmap color changes in favor of accessible theme

revert heatmap color changes in favor of accessible theme

diff --git a/app/assets/stylesheets/common/base/_topic-list.scss b/app/assets/stylesheets/common/base/_topic-list.scss
index 6113446..5b9cff0 100644
--- a/app/assets/stylesheets/common/base/_topic-list.scss
+++ b/app/assets/stylesheets/common/base/_topic-list.scss
@@ -212,15 +212,15 @@
 
 .heatmap-high,
 .heatmap-high a {
-  color: #ec7213 !important;
+  color: #fe7a15 !important;
 }
 .heatmap-med,
 .heatmap-med a {
-  color: #b06318 !important;
+  color: #cf7721 !important;
 }
 .heatmap-low,
 .heatmap-low a {
-  color: #93704a !important;
+  color: #9b764f !important;
 }
 
 .topic-list .heatmap-high {

GitHub sha: 6e1a33b7