Do I need any additional hardware to install these?

These mount at factory points, so you're using your truck's existing fasteners. Grab a socket set and you're done—no extra brackets or bolts needed.

Are the factory bulbs compatible with these lights?

Yes, the existing bulbs from your Colorado plug straight into these assemblies. No swapping required.

Will these fit if I have aftermarket bumpers?

These are designed for factory mounting points. If your bumper shifts those points or blocks access, test-fit before committing to installation.