Costello Dark is a Free Dark Portfolio WordPress theme with a contemporary responsive dark style and a wide range of customizability options. The theme is appropriate for all types of portfolio websites, including those run by individual bloggers, and other comparable experts. This theme’s dark layout gives your portfolio website an extra inviting and eye-catching appearance to visitors. This theme has a dark, bold look in addition to a large theme options panel where you may change the colors, fonts, backgrounds, and other settings.