Grey Pen in dreams
An ink-bearing writing tool — the means of recording what you mean, in your own hand.
How grey changes the reading
Grey colour layers ambiguity onto the symbol. The base meaning is still there, but the dream is saying you do not yet have the colour information — the situation has not declared itself.
The base reading of Pen
A pen in a dream is the dream's image of the means by which an inner intention becomes a recorded line. Pens commit; what is written in ink is harder to retract than what is written in pencil. The dream brings the pen when something in your life — a decision, a confession, a signature — is ready to be put down in a form that will outlast the impulse. A pen writing cleanly is the dream telling you the moment of commitment is the right one. A pen that has run dry is the dream noting that the will to commit was there but the resource — energy, conviction, courage — has run out at the wrong moment.