PMP450 - Indicator for a duplicate color code

Since it's possible to have color code 1 duplicated down in the "Additional Color Codes" table, it'd be nice if the duplicate in the lower table was indicated somehow, either an asterix (*) beside it (with a mouse over saying it's not being used), have the entry greyed out or have it struck out.  

Just something to show a tech why the behaviour they are expecting isn't being observed. (Grumble grumble... education system... something something... reading comprehension skills... grumble grumble...)

Either that, or just merge cc1 down into the list so its all in one place and give an error on save if no "primary" color code is set.