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Cannot change color of gridlines with `panel.grid` #2352
library(ggplot2) g <- ggplot(cars, aes(speed, dist)) + geom_point() new_line <- element_line(color = "blue", size = 2, linetype = 2, lineend = "round", arrow = grid::arrow())
Changes all attributes, but not color.
g + theme(panel.grid = new_line)
Going higher up the inhertance tree doesn't work
g + theme(line = new_line)
But going down does.
g + theme(panel.grid.minor = new_line)