Removing colored line on left edge from embedded note

Hi, New to Obsidian but enjoying it. I am trying to create a list of notes about my father-in-laws WW2 missions with the 8th Air Force. I currently have note files for each mission and I embed them in a master file. When I embed each note I find there is a colored line on the left hand edge (see included image) that I do not want to see.

Is there a way to eliminate this color. Obsidian is such a big, deep tool I understand this may exist in the documentation so I am happy to dig in if someone can point me in the right direction. So far I am not seeing this in the help materials.

For most themes, this CSS snippet will work for removing the left vertical line:

body {
    --embed-border-left: unset;

For more embed options, have a look at SlRvb’s snippet: