Turn highlights into tag

Hi!
Situation: I have several things highlighted in different colors, normally each color has a meaning.
Suggestion: Making highlights also a tag.
Result: Turning highlights into tags would allow for all things highlighted in green, for example, to be grouped under a tag.
Effect: This would act more or less like highlighting text while reading a book using Apple Books app or Kindle. Everything highlighted in a color would be “bookmarked” under a tag.