Can the colour of these be tweaked with Repaint mod?

@MiKO - It's possible that there's a mod that'd do it, but I've been out of the Skylines loop for a while so I'm not too sure what's out there. I'm not familiar with any easy way to do it unfortunately.

These rocks look great! One question: I placed hundreds of these *brown* rocks in my city, and now I realized that I'd prefer to use the *classic grey* ones. There's obviously a 1-to-1 match between them, but there's no way to replace all of them once they are placed in the city, is there?