/usr/share/elmerpost/lib/colormaps/gray_4.cm is in elmer-common 6.1.0.svn.5396.dfsg2-4ubuntu4.
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 | !
!
! 4 gray levels
!
! Juha Ruokolainen CSC
!
! 17 Sep 1995
!
! code index red green blue
!
knot 0 0 0 0 ! start from black
knot 3 100 100 100 ! to white
|