[BUG] Placeholder text is barely visible

[nvllz]

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Description
I mark it as a bug, because it's the same problem for light and dark themes. The placeholder text visibility in "New Habit" screen is too low.

Step to Reproduce
Set your screen brightness to low and try to add a new habit. You will not be able to read the placeholders.

Expected Behavior
This kind of text is expected to be more visible.

Screenshots

[Miaaaim]

duplicate #119

[nvllz]

Sorry, I don't know how I missed that.