Markdown Picture Color Problem

Created by: MohammadArik

Hi there! I am amazed to see such an amazing explanation repo on systems design! But a problem I faced as a "dark mode" user is the arrows used in the pictures are way similar to the background of the dark mode of GitHub... So I request to change the colors of the arrow to light-grey so that they can be visible in both light and dark mode...

Advanced thanks for your respectable criticism of my claim!