How to make one legend entry for same colour?

Specific Domains Visualization
#1

Is there a way to make one legend entry per colour? I’d like to specify that green represents plants and brown represents nutrients. I am using Plots.jl

image

MWE

foo = 1:10; bar = rand(10, 2)
my_plot = plot(foo, bar)
bart = rand(10)
plot!(my_plot, foo, bart,color=1)

image

So I’d like to have one legend entry for orange and one for blue, even though it plots foo and bart.

#2

You could just plot the first line of each colour separately and provide a label, then pass an empty label to subsequent plot calls with that colour:

plot(1:10, rand(10), color = 1, label = "Blue")
plot!(1:10, rand(10), color = 2, label = "Orange")

for _ in 1:10
    plot!(1:10, rand(10), color = 1, label  = "")
end