Tile card feature inconsistent when light is OFF.

[BBE-FR]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

When using Tile card for a smartbulb (white, dimmable, with temperature control)

The tile feature related to color temperature control remains always orange, even when the light is off, in dark or light modes:

This orange color is very visible and can mislead the user that the light is still on, specially with a lot of lights on the dashboard.

This behaviour is particularly visible on a dedicated light view where you put all lights. If you have a summary on your dashboard, you know that 1 or 2 lights are on and want to check which light is ON, you click on this summary card and expect to see colored cards only on lights that are ON.
If you set wide cards with temperature slider, all those lights appears wrongly as ON, making it more difficult to spot the lights that are really ON.

In my opinion, this is making this feature unusable. This make me stay with mushroom light cards just to be capable to use this feature when needed in dashboard.

Describe the behavior you expected

Preferred behavior would be to have the tile feature with the same behavior as the luminosity feature: namely to have the same grey background exactly as the "luminosity" feature when light is off:

Moreover, I think that this behavior should be the default behavior for all features available, except if it is really relevant to maintain a specific feature color when the associated entity is off.
I described my view on this feature consistency proposal in the following discussion here: https://github.com/orgs/home-assistant/discussions/489#discussioncomment-13985246

Steps to reproduce the issue

1 - Create a tile for a light with color temperature tuning.
2 - Add color temperature feature to the Tile card
3 - Set the light ON or OFF.

What version of Home Assistant Core has the issue?

All

What was the last working version of Home Assistant Core?

Never

In which browser are you experiencing the issue?

All

Which operating system are you using to run this browser?

Android / Windows

State of relevant entities

Problem-relevant frontend configuration

JavaScript errors shown in your browser console/inspector

Additional information

Note: this bug was already documented once and closed but not corrected: #21895 (comment)

On a close topic, all attends to have a color picker slider feature have been discarded (arguing that this would clutter the display). But somehow this inconsistent temperature slider was kept and not corrected. Following PR for info and context:
#25591
#24392