Devtools announcement has text that has a background that is difficult to read

[abdallahshaban557]

Steps to reproduce

1. Create a new app on flutter v 3.44 or after.
2. Open devtools
3. The announcement will be shown on the right hand side of the devtools with hard to read text due to the background color.

Expected results

The display text for the release notes header text should be eligible and accessible.

Actual results

Currently, there is a background color added to the devtools announcement that makes it hard to read.

Code sample

N/A

Screenshots or Video

Logs

N/A

Flutter Doctor output

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.44.5, on macOS 26.5.2 25F84 darwin-arm64, locale en)
[✓] Android toolchain - develop for Android devices (Android SDK version 36.1.0)
[✓] Xcode - develop for iOS and macOS (Xcode 26.1)
[✓] Chrome - develop for the web
[✓] Connected device (4 available)
[✓] Network resources

• No issues found!