Change the color of highlight using double equal sign

Depending on what theme you use, there might be a setting for it in Style Settings. Best to change it there so it doesn’t look funky with light/dark themes. If not, this snippet works: color is the text color (commented out here) and background-color is the highlight color.

.cm-s-obsidian span.cm-formatting-highlight, .cm-s-obsidian span.cm-highlight {
  /*color: purple;*/
  background-color: pink;
}

.markdown-preview-view mark { 
  /*color: purple;*/
  background-color: pink;
}
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