/usr/share/gnuplot/gnuplot/4.6/colors_podo.gp is in gnuplot-qt 4.6.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | # Palette of colors selected to be easily distinguishable by
# color-blind individuals with either protanopia or deuteranopia
# Bang Wong [2011] Nature Methods 8, 441.
set linetype 1 lc rgb "black"
set linetype 2 lc rgb "#e69f00"
set linetype 3 lc rgb "#56b4e9"
set linetype 4 lc rgb "#009e73"
set linetype 5 lc rgb "#f0e442"
set linetype 6 lc rgb "#0072b2"
set linetype 7 lc rgb "#d55e00"
set linetype 8 lc rgb "#cc79a7"
set linetype cycle 8
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