Do some colors trigger more neural activity in human brain?
The paper from Stoughton &amp; Conways (2008), where the linked Design Shack webpage refers to, explains that in the visual nucleus in the brainstem (LGN) as well as in the primary visual cortex, most of the color-selective neurons are selectively responsive to colors in the red-cyan axis (Fig. 1).


Fig. 1. RGB color space. source: Commodore 128 forum

This indeed means that these colors evoke more brain activity in these regions of the brain.

Note that a perception curve mentioned on the linked D'Source webpage is nonsense terminology