How to change on hover background color in pickerInput?

Question

I need to change the background color with which the pickerInput highlights the on hover option. How can I achieve it?. Below is a minimal example, I have tried changing the style but I can't get it

library(shiny)

shinyApp(
        ui = basicPage(
                pickerInput("state", "State", split(state.name, state.division),
                        choicesOpt = list(style = rep(("hover {background: blue; color: black; font-weight: bold}"),100)))
        ),
        server = function(input, output) {}
)

As you can see in the example, the background of the on hover option is light gray and not blue.