diff --git a/htmlChecks.sh b/htmlChecks.sh
new file mode 100755
index 000000000..934642a7f
--- /dev/null
+++ b/htmlChecks.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+#
+# Post-build checks on HTML go here.
+
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+
+cd doc/build
+
+# 1. Check for rST formatting issues that don't cause build warnings/errors
+echo "Checking for \"grey bar\" formatting errors in output ..."
+GREY_FILES=( $(grep -rl --include="*.html" "blockquote" .) )
+if [ ${#GREY_FILES[@]} != 0 ]; then
+    echo "Found ${#GREY_FILES[@]} file(s):"
+    for FILE in ${GREY_FILES[@]};
+    do
+        echo -e "${RED}$FILE${NC}"
+    done
+    echo "Using a browser, locate vertical grey bars in the left margin of the above file(s), then correct the issue(s) in the cooresponding rST file(s)."
+    # Set -W to halt tox
+    if [[ $1 == "-W" ]]; then
+        exit 1
+    fi
+fi
+
+# 2. do - check for emdash before option (missing backticks)
\ No newline at end of file
diff --git a/tox.ini b/tox.ini
index 8bf55d928..badcc37d1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,6 +17,9 @@ deps =
   -r{toxinidir}/doc/requirements.txt
 commands =
   sphinx-build -a -E -W --keep-going -d doc/build/doctrees -b html doc/source doc/build/html {posargs}
+  bash htmlChecks.sh
+whitelist_externals = bash
+                      htmlChecks.sh
 
 [testenv:api-ref]
 deps = {[testenv:docs]deps}