Energy: Wrong color in device chart

[EinfachHans]

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

In the energy section the chart for single devices (detailed) the color seems to be wrong.

See the attached screenshot:

As you can see at 12:00 the chart shows that the whole usage would be for the lightred device "Schlafzimmer Fernseher", which is wrong. You can see the whole usage of that day in the chart below is around 0.03 kWh.

Generally it looks like the "untracked" energy part is not shown correctly and instead added to the last device in the list. E.g. when i disable the device in the legend the chart turns blue as it takes the next one in the list:

Describe the behavior you expected

The chart should display untracked energy correctly

Steps to reproduce the issue

1. Open energy dashboard
2. View the mentioned chart

What version of Home Assistant Core has the issue?

core-2025.3.1

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue?

Safari

Which operating system are you using to run this browser?

iOS 18.3.1

State of relevant entities

Problem-relevant frontend configuration

Javascript errors shown in your browser console/inspector

Additional information

No response