I always thought that it was a quick metaphor for heat(red, white) and cold (blue, black). I have a hard time relating other colormaps in the same way. Maybe t

I always thought that it was a quick metaphor for heat(red, white) and cold (blue, black). I have a hard time relating other colormaps in the same way. Maybe the difference is not 'conceptual' but some atavic or cultural reaction?