Eigengrau / [ay-gen-gr-ow ] - noun. intrinsic light; the colour seen by the eye in perfect darkness Rose believes in true love and leprechauns. Her flatmate Cassie is engaged in a fervent struggle against patriarchal oppression. Across London, Mark believes in the power of marketing. His flatmate Tim Muffin is engaged in a fervent struggle against his own waistline. In a city where Gumtree can feel like your closest friend, looking for the right person can lead you all the wrong places.Penelope Skinner''s Eigengrau premiered at the Bush Theatre, London, in March 2010 in a Strawberry Vale production.