diff --git a/llvm/tools/llvm-cov/CodeCoverage.cpp b/llvm/tools/llvm-cov/CodeCoverage.cpp
--- a/llvm/tools/llvm-cov/CodeCoverage.cpp
+++ b/llvm/tools/llvm-cov/CodeCoverage.cpp
@@ -973,6 +973,11 @@
       "project-title", cl::Optional,
       cl::desc("Set project title for the coverage report"));
 
+  cl::opt<std::string> CovWatermark(
+      "coverage-watermark", cl::Optional,
+      cl::desc("<medium>,<low> value indicate thresholds for medium and low"
+               "coverage watermark"));
+
   auto Err = commandLineParser(argc, argv);
   if (Err)
     return Err;
@@ -982,6 +987,34 @@
     return 1;
   }
 
+  ViewOpts.MediumCovWatermark = 100.0;
+  ViewOpts.LowCovWatermark = 80.0;
+  if (!CovWatermark.empty()) {
+    auto WaterMarkPair = StringRef(CovWatermark).split(',');
+    if (WaterMarkPair.first.empty() || WaterMarkPair.second.empty()) {
+      error("invalid argument '" + CovWatermark +
+            "', must be in format 'medium,low'", "-coverage-watermark");
+      return 1;
+    }
+
+    char *EndPointer = nullptr;
+    ViewOpts.MediumCovWatermark = strtod(WaterMarkPair.first.begin(),
+                                         &EndPointer);
+    if (EndPointer != WaterMarkPair.first.end()) {
+      error("invalid argument '" + WaterMarkPair.first +
+            "', invalid value for 'medium'", "-coverage-watermark");
+      return 1;
+    }
+
+    ViewOpts.LowCovWatermark = strtod(WaterMarkPair.second.begin(),
+                                      &EndPointer);
+    if (EndPointer != WaterMarkPair.second.end()) {
+      error("invalid argument '" + WaterMarkPair.second +
+            "', invalid value for 'second'", "-coverage-watermark");
+      return 1;
+    }
+  }
+
   ViewOpts.ShowLineNumbers = true;
   ViewOpts.ShowLineStats = ShowLineExecutionCounts.getNumOccurrences() != 0 ||
                            !ShowRegions || ShowBestLineRegionsCounts;
diff --git a/llvm/tools/llvm-cov/CoverageViewOptions.h b/llvm/tools/llvm-cov/CoverageViewOptions.h
--- a/llvm/tools/llvm-cov/CoverageViewOptions.h
+++ b/llvm/tools/llvm-cov/CoverageViewOptions.h
@@ -50,6 +50,8 @@
   std::string CreatedTimeStr;
   unsigned NumThreads;
   std::string CompilationDirectory;
+  float MediumCovWatermark;
+  float LowCovWatermark;
 
   /// Change the output's stream color if the colors are enabled.
   ColoredRawOstream colored_ostream(raw_ostream &OS,
diff --git a/llvm/tools/llvm-cov/SourceCoverageViewHTML.cpp b/llvm/tools/llvm-cov/SourceCoverageViewHTML.cpp
--- a/llvm/tools/llvm-cov/SourceCoverageViewHTML.cpp
+++ b/llvm/tools/llvm-cov/SourceCoverageViewHTML.cpp
@@ -338,7 +338,7 @@
   SmallVector<std::string, 8> Columns;
 
   // Format a coverage triple and add the result to the list of columns.
-  auto AddCoverageTripleToColumn = [&Columns](unsigned Hit, unsigned Total,
+  auto AddCoverageTripleToColumn = [&Columns, this](unsigned Hit, unsigned Total,
                                               float Pctg) {
     std::string S;
     {
@@ -350,9 +350,9 @@
       RSO << '(' << Hit << '/' << Total << ')';
     }
     const char *CellClass = "column-entry-yellow";
-    if (Hit == Total)
+    if (Pctg >= Opts.MediumCovWatermark)
       CellClass = "column-entry-green";
-    else if (Pctg < 80.0)
+    else if (Pctg < Opts.LowCovWatermark)
       CellClass = "column-entry-red";
     Columns.emplace_back(tag("td", tag("pre", S), CellClass));
   };