It appears that the portfolio download button isn’t linked to the global button designs through the theme options. We’ll address this issue in our upcoming version. In the meantime, you can use the following CSS code to change the button color:
p.portfolio-des-n-link {
background: #47C494;
}
p.portfolio-des-n-link:hover {
background: red;
}
This should help you adjust the appearance as needed.
