Background "Transparency"

[Chompy80]

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

The description of this setting does not match the functionality. 100% transparent would make the background clear/invisible. The scale needs to be reversed, otherwise the setting should be called "Background opacity" to accurately describe the functionality.

Describe the behavior you expected

I expected "100% transparent" to make the background invisible, however it does the opposite.

Steps to reproduce the issue

N/A - Minor issue with feature name.

What version of Home Assistant Core has the issue?

core-2025.1.0b1

What was the last working version of Home Assistant Core?

core-2024.12.5

In which browser are you experiencing the issue with?

All

Which operating system are you using to run this browser?

Sequoia 15.2

State of relevant entities

No response

Problem-relevant frontend configuration

No response

Javascript errors shown in your browser console/inspector

No response

Additional information

No response

[silamon]

Fully agree, I've opened a PR to change it. (It will also change they key in the yaml to match better, so there's a breaking change coming in. )