Dell 3110cn - Printing in colour from Leap 15.1

I’ve installed a new version of Leap 15.1 and used Yast2 to install my Dell 3110cn colour printer with a driver of the correct name . I’m able to print OK but only in mono. Can anyone help please?

Can you confirm which driver is in use please?

egrep -i "name|model|filter" /etc/cups/ppd/*

I’ve also replied in your other thread discussing Dell printers…