Ochre
An earthy yellow-brown — the colour of pigment humans have used since the deepest past.
Ochre in a dream is the dream's image of an earthy yellow-brown — the colour humans have used to mark skin, cave walls, and the dead for as long as there have been humans. Ochre is the oldest pigment in human use; the dream brings the colour when something in your life is connecting you to a very old layer of meaning — ritual, ancestry, the long human record of marking that something mattered. Ochre applied with intent is the dream telling you the deep mark is being made. Ochre wiped off, or refused, is the dream noting that the connection to that long, deep layer is currently being severed in favour of something newer and thinner.