BUG: class Color() is also called in other function than get_slices_matching_with_vertebral_levels() in sct_extract_metric
BUG: class Color() is also called in other function than get_slices_matching_with_vertebral_levels() in sct_extract_metric

Former-commit-id: 9052af94ae1a2bf97dcc3b2b4d4d5d269b77aaca [formerly 6235d608e14c59a793f3fcb1ff023733f49c2742]
Former-commit-id: 93f6ee2e0c2e2f653a02bdb306428f86cb3add71
Former-commit-id: f47021e9bb3cf8d3e4ba4b0e99cb95b8689080b6
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox