If you are a git user, you can install the theme and keep up to date by cloning the repo:
git clone https://github.com/dracula/hyprland.git
Download using the GitHub .zip download option and unzip them.
Copy/replace the given colors from hyprland.conf into ~/.config/hypr/hyprland.conf.
ie. cat hyprland.conf >> ~/.config/hypr/hyprland.conf and adjust with your preferred editor.
Copy dracula_colors.conf + hyprlock.conf into ~/.config/hypr/ and change the path to your wallpaper in the latter file.