[dev-overlay] style: improve error label background color contrast (#76490)
### Why?
The color contrast for the error label does not satisfy AAA of WCAG
color contrast standards.
Even though it is AA, the text is small and is generally hard to read.
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EDIT 😂
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Closes NDX-901
next.js
10ff5509 - [dev-overlay] style: improve error label background color contrast (#76490)
