I've used black, blue, purple, pink and gold acyrlic paint mixed for the paint pouring technique. I layer the paint in a cup and pour it across the canvas, spreading the paint around on the black painted background. This is what created the marbled patterns.
When dry, I added gold in sections to contrast against the dark colours. The gold really pops.
The canvas measures about 40cm by 50cm. It can be mounted on the wall with a painting hook.
You can see in the images, I have the canvas displayed along with other paintings. It can also be displayed alone, as a feature point. The painting looks good positioned both horizontal and vertical.