FIX: WCAG-AA compliant topic list heatmap colors

FIX: WCAG-AA compliant topic list heatmap colors

Color #ec7213: 3.0, Bold - AA Large Pass Color #b06318: 4.50, Normal - AA Pass Color #93704a: 4.51, Normal - AA Pass

Used the Chrome Inspector color picker curves to preserve the hue and make minimally invasive changes to the coloring.

diff --git a/app/assets/stylesheets/common/base/_topic-list.scss b/app/assets/stylesheets/common/base/_topic-list.scss
index 2ac61a4..4250650 100644
--- a/app/assets/stylesheets/common/base/_topic-list.scss
+++ b/app/assets/stylesheets/common/base/_topic-list.scss
@@ -212,15 +212,16 @@
 
 .heatmap-high,
 .heatmap-high a {
-  color: #fe7a15 !important;
+  color: #ec7213 !important;
+  font-weight: bold;
 }
 .heatmap-med,
 .heatmap-med a {
-  color: #cf7721 !important;
+  color: #b06318 !important;
 }
 .heatmap-low,
 .heatmap-low a {
-  color: #9b764f !important;
+  color: #93704a !important;
 }
 
 .loading .topic-list {

GitHub sha: 3b7ba8ec

This commit appears in #9380 which was approved by eviltrout. It was merged by riking.