add the validator into the settings

openpype/hosts/maya/plugins/publish/validate_look_color_space.py

@@ -15,7 +15,6 @@ class ValidateMayaColorSpace(pyblish.api.InstancePlugin):
     families = ['look']
     hosts = ['maya']
     label = 'Maya Color Space'
-    optional = True
 
     def process(self, instance):
         ocio_maya = cmds.colorManagementPrefs(q=True,

openpype/settings/defaults/project_settings/maya.json

@@ -306,6 +306,11 @@
             "optional": true,
             "active": true
         },
+        "ValidateMayaColorSpace": {
+            "enabled": true,
+            "optional": true,
+            "active": true
+        },
         "ValidateAttributes": {
             "enabled": false,
             "attributes": {}

openpype/settings/entities/schemas/projects_schema/schemas/schema_maya_publish.json

@@ -144,6 +144,10 @@
                 {
                     "key": "ValidateShadingEngine",
                     "label": "Validate Look Shading Engine Naming"
+                },
+                {
+                    "key": "ValidateMayaColorSpace",
+                    "label": "ValidateMayaColorSpace"
                 }
             ]
         },