diff --git a/src/common/script_system/meshlabfilterXMLspecificationformat.xsd b/src/common/script_system/meshlabfilterXMLspecificationformat.xsd
index 2cbc4c0e4..1d4e78b5e 100644
--- a/src/common/script_system/meshlabfilterXMLspecificationformat.xsd
+++ b/src/common/script_system/meshlabfilterXMLspecificationformat.xsd
@@ -49,6 +49,7 @@
      <xs:element ref='ABSPERC_GUI'/>
 	 <xs:element ref='EDIT_GUI'/>
 	 <xs:element ref='VEC3_GUI'/>
+	 <xs:element ref='COLOR_GUI'/>
     </xs:choice>
    </xs:sequence>
    <xs:attribute name='parType' use='required'>
@@ -58,6 +59,7 @@
       <xs:enumeration value='Real'/>
 	  <xs:enumeration value='Vec3'/>
 	  <xs:enumeration value='Integer'/>
+	  <xs:enumeration value='Color'/>
      </xs:restriction>
     </xs:simpleType>
    </xs:attribute>
@@ -98,6 +100,13 @@
   </xs:complexType>
  </xs:element>
  
+ 
+ <xs:element name='COLOR_GUI'>
+  <xs:complexType>
+   <xs:attribute name='guiLabel' type='xs:string' use='required'/>
+  </xs:complexType>
+ </xs:element>
+ 
  <xs:simpleType name="ArietyType">
   <xs:restriction base="xs:string">
     <xs:enumeration value="SingleMesh"/>