Color the caulk with grout
If you've checked out the sanded caulk near the grout in the tile department and can’t find one to match your tile project, just follow these two steps. First add the colored grout to a large blob of fresh caulk and mix it in (Photo 1).
Tape off the caulking area and apply the mixture
Once you've mixed in enough grout to match your existing grout, load the grout/caulk mix into a zip-top bag and apply it (Photo 2).