Descriptive:
* The vast, unicolor sky stretched endlessly above the desert.
* Her unicolor dress flowed gracefully as she walked.
* The unicolor walls of the minimalist home gave the space a sense of calm.
* The unicolor flag of the nation was a simple symbol of unity.
Contrasting:
* Unlike the colorful designs of the other fabrics, this one was unicolor.
* The unicolor artwork stood in stark contrast to the vibrant, multi-hued paintings in the gallery.
* The unicolor paint job made the old car look surprisingly modern.
Figurative:
* His life felt like a unicolor canvas, lacking the vibrancy of past experiences.
* The town was a unicolor landscape, devoid of any excitement or change.
Formal:
* The scientific study focused on the unicolor variations in the species.
* The unicolor design of the product was intended to appeal to a wider audience.
These are just a few examples, and you can certainly use "unicolor" in other creative ways depending on the context.