Does your feature request involve difficulty for you to complete a task? Please describe.

With TTS, the text can be difficult to read on darker backgrounds due to the highlight's grey color.

Describe the solution you'd like

I would like to be able to customize the highlight color of the TTS text with CSS or selecting options from the TTS menu.

Describe alternatives you've considered

Alternatively, the highlight could automatically change depending on theme using the premade color palettes. For custom themes, there would need to be an added option to customize the highlight color.

Also, the individual highlighted word can be a separate color from the sentence highlight similar to ElevenReader (screenshot below).

Additional context