I'm trying to fix up the entry drive to a house that was previously overrun by weeds. I have put down weed membrane and MOT 1 subbase in an effort to return the drive to hardcore and then tamped it down. I'm a bit concerned about the difference in colour from the new hardcore (grey) to the old drive (greyish brown) - is this going to fade over time to eventually match? Also, how deep does the new hardcore need to be - the new area being covered doesn't get driven on a lot, hence all the weeds that grew...appreciate any advice!!