Pega is not allowing me to customize the OOTB control Color Picker. Even if I save as the control in our application ruleset and refer a different activity, it is calling the same activity ShowColorPicker. 

We are using color picker control for implementing one of our project requirement. By default hex code is mapped to the property but there is RGBA value as well which is not mapped but we need that value to calculate another field called transparency. Unable to customize the control since all the underlying rules are final. Tried to create new control and give a different activity but still it is picking the OOTB activity ShowColorPicker. Since the OOTB control is not considering A (FF or 00 value) while setting Hex code, we need to customize this control to get A value.