diff --git a/guacamole/src/main/webapp/app/form/templates/terminalColorSchemeField.html b/guacamole/src/main/webapp/app/form/templates/terminalColorSchemeField.html
index 2c6e50f1e..4f03548f0 100644
--- a/guacamole/src/main/webapp/app/form/templates/terminalColorSchemeField.html
+++ b/guacamole/src/main/webapp/app/form/templates/terminalColorSchemeField.html
@@ -97,6 +97,7 @@
     </h3>
 
     <!-- Custom color scheme details (internal representation -->
-    <textarea class="custom-color-scheme-details" ng-model="model" ng-show="isCustom()"></textarea>
+    <textarea class="custom-color-scheme-details" spellcheck="false"
+              ng-model="model" ng-show="isCustom()"></textarea>
 
 </div>