Dark font text is thinner than white, how to fix it?

Question

css

I connected the Gotham Pro font to the site, but I get dark text thinner than white, what could be the problem?

Connected like this:

@font-face {
    font-family: 'GothamPro';
    src: url('../fonts/GothamPro/GothamPro-Medium.eot');
    src: local('GothamPro Medium'), local('GothamPro-Medium'),
        url('../fonts/GothamPro/GothamPro-Medium.eot?#iefix') format('embedded-opentype'),
        url('../fonts/GothamPro/GothamPro-Medium.woff') format('woff'),
        url('../fonts/GothamPro/GothamPro-Medium.ttf') format('truetype');
    font-weight: 500;
    font-style: normal;
}