/usr/share/gmt/cpt/copper.cpt is in gmt-common 5.2.1+dfsg-3build1.
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1 2 3 4 5 6 | # $Id: copper.cpt 12822 2014-01-31 23:39:56Z remko $
#
# Simulates the COPPER colormap in Matlab
#
0 0/0/0 0.796875 255/159/102
0.796875 255/159/102 1 255/200/128
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