Hi again.
Sorry, but please, I wrote:
“The way it was before, was that it changed the black color to the turkish color that comes when you hover the star. This color could be customised in the WP customiser !”
– The CSS you supplied me with changes the color of the text, and not the black button color.
Also, this seems like a “hard-fix” where I won’t be able to customise the color through the Color Customizer afterwards.