Blue anodised (is that a word?) aluminium cut in correct shape and made holes and then print white numbers on transparent film and put those together. I think it is best way to get S60R look a like dials, also illumination should be ok then. But it needs high level of metal work skills and equipment

Of course it is possible to print blue backgrounds too, but it will not look very same, depends a lot from printer.
It is also possible to alter illumination colour. It is needed to remove plastic green filters from inside of meters and make new ones from plastic with preferred colour, it is suprisingly easy also what I have heard, but never done it by myself.
Those white dials are meant to print to for example photopaper with good inkjet. Then paper is needed to glue into dials and voilá you have new dials ready. Of course some disassembling needed first

Volvo 360GL -88 -under restoration-
Volvo 343DL vario -81 -running-

Volvo 240 Diesel -83 -undecided-
Citroen ZX Dturbo -97 -daily-

