/usr/share/plplot5.10.0/tcl/cmap0a.pal is in plplot-tcl 5.10.0+dfsg2-0.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#000000
#ff0000
#ffff00
#00ff00
#32bfc1
#ffb5c5
#f5deb3
#7e7e7e
#a52a2a
#0000ff
#8a2be2
#00ffff
#19ccdf
#ff00ff
#e9967a
#ffffff
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