# set terminal png transparent nocrop enhanced font arial 8 size 420,320 
# set output 'rgb_variable.2.png'
set border -1 front linetype -1 linewidth 1.000
set ticslevel 0
set xlabel "Red" 
set xlabel  offset character 0, 0, 0 font "" textcolor rgb "red"  norotate
set xrange [ 0.00000 : 255.000 ] noreverse nowriteback
set ylabel "Green" 
set ylabel  offset character 0, 0, 0 font "" textcolor rgb "green"  rotate by 90
set yrange [ 0.00000 : 255.000 ] noreverse nowriteback
set zlabel "Blue" 
set zlabel  offset character 0, 0, 0 font "" textcolor rgb "blue"  norotate
set zrange [ 0.00000 : 255.000 ] noreverse nowriteback
rgb(r,g,b) = int(r)*65536 + int(g)*256 + int(b)
splot 'rgb_variable.dat' using 1:2:3:(5*rand(0)):4 with points pt 7 ps variable lc rgb variable       title "variable pointsize and rgb color read as hexidecimal"