How do you deal with transparent fonts that you want to be white?

I’m a bit of a total amateur, but I thought I would learn how to make a simple game during quarantine.

However, I stumbled into a problem with fonts. I’m thinking about using the free font "Pixelmania" to show a score at the top of the screen. But the font is transparent! How do I make the inner part of the font white? Do I have to manually edit the font file myself? Or is there an easier way?

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