Dramatic in all black, and heavily-textured. The texture appears to crawl (or creep) across the canvas, which is where the name Creeping Expansion came from. It makes me think of how you can see ice crystals growing on a smooth surface when using time lapse photography.
This painting is all black, but different light will make it appear to change from black to grey. Sometimes the chunky texture will stand out as grey, sometimes the background will stand out as grey and sometimes it will all look black. It's all up to the light.
Whatever colour it looks, you won't be able to resist touching it to see how it feels.