/usr/share/gwyddion/glmaterials/Warmish-White is in gwyddion-common 2.47-1.
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 | Gwyddion resource GwyGLMaterial
0.3 0.2 0.2 1.0
1.0 0.9 0.8 1.0
0.4 0.2 0.2 1.0
0.0 0.0 0.0 1.0
.35
|