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winpulse

winpulse-mode momentarily flashes the background of Emacs windows whenever they gain focus, providing a visual cue for the active window.

Install / Setup

(use-package winpulse
  :vc (:url "https://github.com/xenodium/winpulse"
       :rev :newest)
  :config
  (winpulse-mode +1))

Customizations

Custom variable	Description
winpulse-brightness	How much to shift the color (0-255 range) at peak flash.
winpulse-duration	Total animation duration in seconds.
winpulse-excluded-buffer-patterns	List of regexps matched against buffer names to skip flashing.
winpulse-ignore-minibuffer-focus	When non-nil, ignore minibuffer focus changes.
winpulse-step-interval	Seconds between animation frames.