diff --git a/src/input/keyplot.cpp b/src/input/keyplot.cpp
index 48eabc8bf..3fc1c4415 100644
--- a/src/input/keyplot.cpp
+++ b/src/input/keyplot.cpp
@@ -36,6 +36,9 @@ int main(void){
   popts.detectdomain = true;
   std::array<struct ncplot*, 5> plots;
   for(auto i = 0u ; i < plots.size() ; ++i){
+    popts.maxchannel = 0;
+    channels_set_fg_rgb(&popts.maxchannel, random() % 256, random() % 256, random() % 256);
+    channels_set_fg_rgb(&popts.minchannel, random() % 256, random() % 256, random() % 256);
     popts.gridtype = static_cast<ncgridgeom_e>(i);
     plots[i] = ncplot_create(planes[i], &popts);
   }
diff --git a/src/lib/plot.c b/src/lib/plot.c
index b211f40e6..01ed571d8 100644
--- a/src/lib/plot.c
+++ b/src/lib/plot.c
@@ -145,6 +145,7 @@ redraw_plot(ncplot* n){
     if(gval > n->maxy){
       gval = n->maxy;
     }
+    ncplane_set_fg(ncplot_plane(n), channels_fg(n->maxchannel)); // FIXME lerp!
     // starting from the least-significant row, progress in the more significant
     // direction, drawing egcs from the grid specification, aborting early if
     // we can't draw anything in a given cell.