Inconsistent active states across the editor UI

[richtabor]

What problem does this address?

Was reviewing the current UI and noticed a few inconsistencies across active states for controls. We have three standard states for indicating an active state, two shades of black and the admin primary color.

Audit:

Uses #2f2f2f/ ($gray-800):

Uses #1e1e1e/ ($gray-900):

Uses var(--wp-admin-theme-color):

What is your proposed solution?

I propose we choose one of the shades of black (either #2f2f2f ($gray-800) or #1e1e1e ($gray-900)). Then employ that color consistently across all active states (including where we're currently using the primary admin color for the link/unlink UI).

[jameskoster]

Agreed, with perhaps the exception of List View. There the theme color creates a visual link with the canvas that can be helpful, especially when we get around to #32163.

Should we also consider toggles, checkboxes, radios? Maybe tokenfields too?

Edit:

A couple of other considerations in the datepicker:

[richtabor]

Agreed, with perhaps the exception of List View. There the theme color creates a visual link with the canvas that can be helpful, especially when we get around to #32163.

That's the one I'm hesitant on most as well.