It's not a critical issue, but ...
The real problem is that I can't change hardcoded colors because my binary crash. I never tried really hard to find where is failure.
Just I think the issue could be a little discouraging for beginners.
Thanks HSE
The image doen't look like here. For some reason, your default background color isn't the same as mine.
I'll look into this issue. I think I've to add some HTML code to prevent it.
Biterider
Mixed hardcoded and system colors sometimes don't look nice.
The background is an Internet Explorer option (if I remember well).
Thinking, perhaps some .css can make the job, without need to develop options.