change colour of selectizeInput options in R Shiny

Question

I would like to change the colour of each individual option of the selectizeInput menu in my Shiny app. In the following example code below I am able to change

Answer 1

You can do:

.option[data-value=a] {
  background: red !important;
  color: white !important;
}
.option[data-value=b] {
  background: green !important;
  color: white !important;
}
.option[data-value=c] {
  background: blue !important;
  color: white !important;
}
.option[data-value=d] {
  background: magenta !important;
  color: white !important;
}