This Python script will replace html with Zotero annotation with more Obsidian friendly that display the color in the preview

ColorAnnotation.py

#!/usr/bin/env python
# # -*- coding: utf-8 -*-
# %%

import urllib, json
import json
import re
import urllib.parse
from colormap import hex2rgb
import argparse
from pathlib import Path
import sys

def substitute_line(line):
    # extract what is needed
    data_annotation = re.search(r'data-annotation="(.*?)"', line).group(1)
    annotation = json.loads(urllib.parse.unquote(data_annotation))
    data_citation = re.search(r'data-citation="(.*?)"', line).group(1)
    citation_text = re.findall('\(.*?\)',line)[-1]

    # make text nice
    citation = json.loads(urllib.parse.unquote(data_citation))
    rgba = hex2rgb(annotation["color"])
    output_text =  f'>#quote <span style="background-color: rgba({rgba[0]},{rgba[1]},{rgba[2]},.75);">' + annotation["text"] + '</span>'
    # Make citation nice
    citation_locator = citation['citationItems'][0]['locator']
    citation_uris = citation['citationItems'][0]['uris'][0].split("/")[-1]
    output_citation = f'[{citation_text}](zotero://open-pdf/library/items/{citation_uris}?page={citation_locator})'
    return(output_text + output_citation)


            
def search_and_replace_file(filename):
    #open file in read mode
    file = open(filename, "r")
    replaced_content = ""

    #looping through the file
    for line in file:

        #stripping line break
        line = line.strip()

        #replacing the texts
        if "data-annotation=" in line:
            new_line = substitute_line(line)
        else:
            new_line = line
        #concatenate the new string and add an end-line break
        replaced_content = replaced_content + new_line + "\n"


    #close the file
    file.close()

    #Open file in write mode
    write_file = open(filename, "w")

    #overwriting the old file contents with the new/replaced content
    write_file.write(replaced_content)

    #close the file
    write_file.close()




# %%
if __name__ == "__main__":
    filename = sys.argv[1]
    search_and_replace_file(filename)

# %%
# pellegrino2019 - Annotations (672021, 125900 PM).md