diff --git a/frontend/src/Editor/Inspector/Inspector.jsx b/frontend/src/Editor/Inspector/Inspector.jsx
index 6cc1d0c33f..98e5331459 100644
--- a/frontend/src/Editor/Inspector/Inspector.jsx
+++ b/frontend/src/Editor/Inspector/Inspector.jsx
@@ -128,6 +128,13 @@ export const Inspector = ({
       if (param.type === 'select' && defaultValue) {
         allParams[defaultValue.paramName]['value'] = defaultValue.value;
       }
+      if (param.name === 'secondarySignDisplay') {
+        if (value === 'negative') {
+          newDefinition['styles']['secondaryTextColour']['value'] = '#EE2C4D';
+        } else if (value === 'positive') {
+          newDefinition['styles']['secondaryTextColour']['value'] = '#36AF8B';
+        }
+      }
     } else {
       allParams[param.name] = value;
     }