Fix scalar number as color in scatterlines

src/basic_recipes/scatterlines.jl

@@ -17,8 +17,8 @@ $(ATTRIBUTES)
         linestyle = l_theme.linestyle,
         linewidth = l_theme.linewidth,
         markercolor = automatic,
-        markercolormap = s_theme.colormap,
-        markercolorrange = get(s_theme.attributes, :colorrange, automatic),
+        markercolormap = automatic,
+        markercolorrange = automatic,
         markersize = s_theme.markersize,
         strokecolor = s_theme.strokecolor,
         strokewidth = s_theme.strokewidth,
@@ -32,8 +32,7 @@ end
 function plot!(p::Plot{scatterlines, <:NTuple{N, Any}}) where N
 
     # markercolor is the same as linecolor if left automatic
-    # RGBColors -> union of all colortypes that `to_color` accepts + returns
-    real_markercolor = Observable{RGBColors}()
+    real_markercolor = Observable{Any}()
     map!(real_markercolor, p.color, p.markercolor) do col, mcol
         if mcol === automatic
             return to_color(col)
@@ -42,6 +41,16 @@ function plot!(p::Plot{scatterlines, <:NTuple{N, Any}}) where N
         end
     end
 
+    real_markercolormap = Observable{Any}()
+    map!(real_markercolormap, p.colormap, p.markercolormap) do col, mcol
+        mcol === automatic ? col : mcol
+    end
+
+    real_markercolorrange = Observable{Any}()
+    map!(real_markercolorrange, p.colorrange, p.markercolorrange) do col, mcol
+        mcol === automatic ? col : mcol
+    end
+
     lines!(p, p[1:N]...;
         color = p.color,
         linestyle = p.linestyle,
@@ -57,9 +66,9 @@ function plot!(p::Plot{scatterlines, <:NTuple{N, Any}}) where N
         strokewidth = p.strokewidth,
         marker = p.marker,
         markersize = p.markersize,
-        colormap = p.markercolormap,
+        colormap = real_markercolormap,
         colorscale = p.colorscale,
-        colorrange = p.markercolorrange,
+        colorrange = real_markercolorrange,
         inspectable = p.inspectable
     )
 end