That would be an easy fix if you customize your init file (~/.emacs, ~/.emacs.el, or ~/.emacs.d/init.el)
Turn on hl-line:
(global-hl-line-mode 1)
Set any color as the background face of the current line:
(set-face-background 'hl-line "#3e4446")
To keep syntax highlighting in the current line:
(set-face-foreground 'highlight nil)