Unless you have an extra piece to spare somewhere else this is going to be your best bet.
Carpet patch does not match carpet.
Apply some carpet adhesive onto the patch requiring floor.
Keep in mind that if you plan on replacing the carpet the patch will adhere to the padding making it harder to salvage the pad.
Because the donor area is filled in either with a piece of remnant carpet or is left unrepaired carpet patching is considered to be imperfect but a net overall improvement.
Tools and supplies you will need.
Hold the patch in place for a little while.
Even if you were lucky enough to find the exact carpet the dye lots would not match.
Never use more than three different.
The best way to have an idea of what the results will be would be to take a remnant piece and set it next to the area that needs to be patched.
There is a rule of thumb for using a variety of flooring throughout a home.
Carpet patching is a simple system of carefully cutting out the damaged area and replacing it with a patch of donor carpet of the same size.
Place your patch to fill the hole the way that the patch s fibers follow the direction of the rest carpeting fibers.
A line or 2 of glue on the surface of the carpet pad will often be sufficient.
If you re using carpet tape stick it onto the base floor as well.
Due to sun fade and wear the piece that is patched in may look newer then the original worn carpet.
The biggest factor is whether or not a piece of carpet from a closet or remnant piece will match.