Code Editor for app.py

import streamlit as st

st.markdown("""
<style>
span[data-baseweb="tag"] {
  color: white;
  background-color: gray;
}

span[data-baseweb="tag"]:has(span[title="Yellow"]) {
  color: black;
  background-color: yellow;
}

span[data-baseweb="tag"]:has(span[title="Red"]) {
  color: black;
  background-color: red;
}

span[data-baseweb="tag"]:has(span[title="Green"]) {
  color: black;
  background-color: green;
}
</style>
""", unsafe_allow_html=True)

st.title('Changing multiselect color')

values = ["Green", "Yellow", "Red", "Blue", "Black"]
options = st.multiselect("What are your favorite colors", values, values)