Dark Theme Cheat Engine is a Cheat Table (.CT) that has LUA scripts that changes the CE colors to a Dark Grey.
Cheat Engine has a bright white that hurts your eyes as it's main color. It's not a huge problem, but this Dark Theme CE fixes that problem.
You can download it here: https://fearlessrevolution.com/viewtopic.php?t=14114 or here: https://github.com/manovisible/darkthemecheatengine/releases