The ore compat system has changed since its initial conception.

It is currently set up to work with the following oreDict / slagColor combinations:

this.put("oreAluminum", "e2e2e3");
this.put("oreCopper", "ffaa1c");
this.put("oreGold", "fcee4b");
this.put("oreIridium", "d5d4e7");
this.put("oreIron", "d8af93");
this.put("oreLead", "95afee");
this.put("oreMithril", "9cf9ff");
this.put("oreNickel", "e4e5d8");
this.put("orePlatinum", "55f3ff");
this.put("oreSilver", "e8f6fd");
this.put("oreTin", "c3e9ff");

The auto-detection system works if there is at least one corresponding nugget oredicted(?) to the same thing, ie. oreIron has at least one entry and nuggetIron has at least one entry.

If you can think of an oreDict / hexColor to add to this list, please post a comment.

Some additions, based on what I'm using in an experimental instance, formatted to match your example:

this.put("oreUranium", "5c734b");
this.put("oreSyrmorite", "4455bb");
this.put("oreOctine", "ffaa22");
this.put("oreCobalt", "1c5bc1");
this.put("oreArdite", "e85e17");

Uranium is Immersive Engineering, Syrmorite and Octine is the Betweenlands, and Cobalt and Ardite are from Tinker's Construct.

oreOsmium from mekanism (and any other that add/use it), though I'm not good with hexcolor so I'm not sure what it should be.

I'd suggest

this.put("oreOsmium", "9babc4");

by sampling from the ingot image.

@nihiltres Thank you! The data you have provided has been added and will be available in 1.1.0