Word replay text colour contrast is hard to see

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To the devs and mods of Monkeytype,

https://github.com/user-attachments/assets/6a6b0127-3cea-4d10-82c5-127a336869d0

As you can see, (barely) the text after the 'o' in 'one' is not typed yet (previewed). It's pretty hard to see the colour difference, even after sitting right in front of the screen. Some people might have eyesight issues, which makes this problem worse for them.

Basically, it's hard to see which letters/words are typed and not typed.

Please note that this issue only occurs in the Rainbow Trail colour theme.

Thank you for your time,
Kauman151

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Current Behavior

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Expected Behavior

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Reproduce the typing test with the Rainbow Trail colour theme and compare the appearance of typed and previewed letters. Locate the frontend styling or theme entry point that controls these colours, then verify the contrast is clearly distinguishable for both states while typing.