Green Dustpan in dreams
A small flat scoop for collected dust — the moment of finally lifting the small mess off the floor.
How green changes the reading
Green colour adds growth and viability. The base meaning is still the meaning — green says it is alive, it is going somewhere, the conditions for it have begun to form.
The base reading of Dustpan
A dustpan in a dream is the dream's image of the last small step in a cleanup — the act of actually taking the pile off the floor instead of leaving it neatly heaped. The dream brings the dustpan when you have done the difficult part of dealing with a small ongoing mess and are now at the stage of disposing of the residue. A dustpan filled and emptied is the dream marking the task complete. A dustpan repeatedly scraping at the same line of dust is the dream noting that the residue is sticking and the cleanup is, in practice, not finishing.