It is from '95, forgot to mention that.
When you strip the story down, one of the elements you can find is that of the artist who suddenly finds himself in a requirement to express himself in a fundamentally different way and to function differently. So that is thread common with the inception of Chroma Key.
Also, I am now completely positive that Watercolor and Chromakey-the-song have their origin in similar stories of people who have extraordinary abilities/disabilities and their unusual consequences - Watercolor being perhaps tied to synestesia ("sounds like watercolor"), some sort of a disfunctional memory and disconnection of the sense of space ("cellar door leads to the attic", "and I can't recall a single word I said"), and also some unusual ties to morning, the "sunny side", the world of video/movies and the sense of sound late at night, being "drowned by it", but also being willing to let it go on - "anything TO drown me". "it's not like I can't stop, pull back the playback in my head". Chromakey has a similar theme, all tied to the visual sense of memories, as far as I could remember, but also having it messed up, not knowing what happened and being confused.