I am trying to change the legend labels for my graph.
when using slzsoil_js_plot_march <- ggplot(slz_soil_Js_march, mapping = aes(TIMESTAMP, Js, color = as.factor(Port))) + geom_line() + labs(title = "SLZ La Casita Sensors 1&4") + scale_color_manual(name = "Sensor", values = c("1" = "darkblue", "4" = "red")) everything is fine. when using scale_color_manual(name = "Sensor", values = c("2" = "darkblue", "3" = "red")) the graph goes greyscale.