R shiny how to remove vertical line and change colors in plotlyproxy and renderPlotly

Hi, I'm having trouble with a reactive plot in R shiny. The goal of the plot is to show multiple points at once, based on user input. Depending on user input, the output results in a vertical line at 0, which I would like to remove. Additionally, I can't seem to get my plot to incorporate a color scheme. Code is below, and any help is appreciated!

        # Server end of main screen plot
            output$plot <- renderPlotly({
                    x <- list(
                        title = "N Leaching [lbs/ac]"
                    y <- list(
                        title = "Yield"
                    plot <- plot_ly(
                        x = vals$Leachable,
                        y = vals$Yield,
                        type = 'scatter',
                        mode = 'markers',
                        marker = list(size = 10, color = brewer.pal(10,"Set3")),
                    plot <- plot %>% layout(xaxis = x, yaxis = y)
        #Server end of clear page button
        observeEvent(input$reset_button, {js$reset()})
        # Takes N Leaching and Yield values and plots them
            observeEvent(c(vals$Leachable, vals$Yield), {
                plotlyProxy("plot",session) %>%
                                      list(x = c(vals$Leachable,vals$Leachable), # need at least 2 points
                                           y = c(vals$Yield,vals$Yield),
                                           type = "scatter",
                                           mode = "markers",
                                           marker = list(size=10),
                                           color = brewer.pal(10, 'Set3')

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