Costello Dark is a Free Dark Portfolio WordPress theme that comes with a modern responsive dark design and highly customizable features and functionalities. The theme is suitable for all kinds of portfolio websites including personal bloggers, creative agencies, freelancers, photographers, illustrators, and similar professionals. The dark design in this theme makes your portfolio website look extra eye-appealing and welcoming to the visitors. Along with the dark bold design, this theme also includes an extensive theme options panel that allows you to tweak colors, fonts, backgrounds, and more. Costello Dark comes with many highly customizable features and sections. For instance, Promotion Headline, Featured Content, Services, Portfolio, Testimonial, Featured Slider, Hero Content, and more. All of these mentioned sections are fully responsive and look absolutely stunning across all devices. In addition, you can also add in your featured sliders and galleries to ace your portfolio.