Casio's a dedicated watch company. Even in their earliest iterations, they were less limited. From the site [1], this appears to be one person's project.

> Going with light grey plastic was a mistake, makes it look like a cheap prop of a metallic object.

I wonder if it's less the colour than the sheen of that specific type of plastic. Casio has some great looking fake-metal. In the end, cheap plastic will probably end up looking like what it is.

1. https://dotslashwatch.com/hardware/