Set a random color on a light

What if you just want the color to change to the next one in the “array”?

color_name: "{{ ['lawngreen', 'blueviolet', 'magenta', 'yellow', 'red', 'blue', 'lime', 'magneta', 'purple'] | random }}"

Can the “random” be changed to anything else?

I have an RGBW led strip, and I cannot figure out why this automation just turns the strip on white.

** Edit - If I have use brightness value (including 100), it turns the strip white. When I remove “brightness_pct”, it works. What would be the data name for COLOR brightness?