Which color should I use to indicate higher intensity, frequency etc.?
I mean, most of the the graphs I've seen use red to indicate high values (intensity, frequency, height) and purple to indicate lower values. Shouldn't it be the opposite considering red has a longer wavelength and purple has a shorter wavelength? Short wavelength means higher frequency.
I know red is more appealing/striking to the eye, but if we were to be technical, shouldn't purple be used?
I'm about to make a graph, so I wanted to know what I am doing.
I'm not sure if this is the right place to ask. I'll move the question if it isn't. I just got curious and wanted to know. Also, I'm not familiar with the tags in this site, so I just added color tag. You can edit it if it needs editing.