It's not a painted part so you're going to have a hard time matching it with off the shelf paint. Depending on the severity of the damage it might be easier to buy a replacement grill off Ebay. The price ranges from $100 to $200 +/- for an OEM pull like this one. I hated the chrome XLT grill on mine and got the grey Lariat grill for it instead. Took about 45 minutes to swap them out and was a perfect fit. Hardest part was disconnecting/transferring the front camera washer and radiator louvers to it. Just make sure to not power the truck on or anything with the front camera disconnected. Otherwise you'll need to recalibrate the front camera. Well if you have 360 cams that is.
Another option or see if one of those mobile paint guys can match the color however no idea how permanent this will be since the OEM part isn't painted.