Looks like the dye may have puddled there next to the stitching for a little too long. Make sure you wipe it off from top to bottom, never side to side, making sure the cloth gets all the dye from the stitching area. Did you use the alcohol or water based dye? Can you post a picture of the dye bottle so I can see which one it is? Like Allen did, the best way to get it uniform is to add a dye coat everywhere except the darker area.
LG NitroHD G2 G3 G4