[turnipla]

You’re missing the point of the query. What’s the point of using the query at all?

OP suggested it as a way for users to customize their HN color; Then you suggested to take this query and make an extension out of it.

If you want to customize your HN color, use CSS, not this roundabout way through a query parameter.

The query never makes sense anyway. If HN were to allow customization they’d allow it in the options, not as a random query that you have to set manually.