Did anyone else notice that Facebook’s color scheme is more...complex? Both Spotify and Youtube use colors whose R, G and B values are identical. But Facebook’s

Did anyone else notice that Facebook’s color scheme is more...complex? Both Spotify and Youtube use colors whose R, G and B values are identical. But Facebook’s colors are much sneakier. Am I wrong to suspect something sinister here? I find myself somewhat attracted to the Facebook colors, as though I need to stare at them longer to figure them out. Do they optimize for this kind of thing (like their infamous shade of blue)?