/usr/share/nrn/lib/shape.cm2 is in neuron 7.5-1.
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 13 | 111 0 111
143 0 127
175 0 95
207 0 63
223 47 47
255 79 15
255 111 0
255 143 0
255 175 0
255 207 0
255 239 0
255 255 0
255 255 200
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