I mean this mod: https://mods.factorio.com/mod/RealisticOres It changes the colors of ores to be more realistic.

The added color (for lamps) as set by this mod are still the original colors for iron/copper. Could you add support for the realists color mod?
(I'm not sure if this should be fixed here, or in realistic ores. I assumed here since you're the one adding colors to the items signal.)

PS: There's no real conflict or problem with them working together. It's just the added color for the ore signal that's an issue.

"I'm not sure if this should be fixed here, or in realistic ores."
I think you might have posted this under the wrong mod.

Anyway, what's the other mod (the one that adds colors to item signals)?

I typed that whole thing up thinking I posted it to the other mod and apparently wound up here instead when I went to find the link here for the post :/
Now I feel stupid...

Anyways, I mean Dectorio: https://mods.factorio.com/mod/Dectorio
At some point I noticed it added colors to the ore signals and they didn't match the colors here.

I'm gonna go post it over there now.

Edit: https://github.com/jpanther/Dectorio/issues/132

I see that PantherX/jpanther has already agreed to solve the issue.
Feel free to inform me if any other mod needs support, though.