Greyt Theme is a lightweight, grayscale theme. The subtle differences in the shades of gray create a soothing environment, with the…Greyt Theme is a lightweight, grayscale theme. The subtle differences in the shades of gray create a soothing environment, with the intention of minimizing the distraction of the browser. The contrast allows for you to differentiate between active and inactive tabs and the dark text makes this theme easy to read at any brightness.