Some thoughts about Purple Guy.

[Tophatrabbit]

There's actually a lot of consistency and inconsistency regarding the purple guy's appearance. I know it's been said before that there's about three or more different shades of purple that are all presumed to be the same person, but I want to offer some facts in hopes that a greater mind will be able to find a deeper meaning.

(All heights and color codes taken from the same videos made by the same accounts so as to not be altered by resolution or recording program color differences.)

The Purple Guy we see in Fnaf3 dismembering the animatronics and running from the ghosts has this code: #4C046D – this sprite contains bits of blue in his design. His sprite is 122 pixels tall. (For reference, Freddy is 107 pixels tall. The crying ghost is 64 pixels tall.) His design is blocky, and he stands upright. (R: 76 G: 4 B: 109) It’s worth noting that this purple is the most saturated, hitting 237 in saturation values, giving it a more vibrant coloration.

Purple Guy and Freddy have a 15 pixel difference.
Purple Guy and Crying Ghost have a 58 pixel difference.

The Purple Guy we see in Fnaf2 smiling next to Foxy in the “Go! Go! Go!” Minigame has this code: #5E3A65 – this sprite is solid in color and possessed black eyes and a black smile. He is 134 pixels tall. (For reference: Foxy is 105 pixels tall. The crying corpses are 66 pixels tall.) His design is blocky, and he stands upright. (R: 94 G: 58 B: 101)

Purple Guy and Foxy have a 29 pixel difference.
Purple Guy and the crying corpses have a 68 pixel difference.

The Purple Guy we see in Fnaf2 that seemingly murders the child in the “Take Cake to the Children” minigame has the code of: #503054 – this sprite is also solid in color and possesses black eyes and smile, though it is harder to tell as the scanlines are thicker in this game. He is 87 pixels tall. (For reference, Freddy is 67 pixels tall. The crying child is 50 pixels tall.) His design is blocky, and he stands upright. (R: 80 G: 48 B: 84)

Purple Guy and Freddy have a 20 pixel difference.
Purple Guy and Crying Child have a 37 pixel difference.

The Purple Guy we see in the “Follow Me” minigame has a code of: #2F2341 – this sprite is extremely tall, and lanky in appearance. His head is also rounded. He wears a badge and carries a stick of some kind. He has a black smile, black eyes that are doted with a bit of white. He is 157 pixels tall. (For reference: Freddy is 95 pixels tall, and also missing his hat. The crying corpses are 76 pixels tall.) His design is more elaborate than other purple men, and he possesses a very long neck and something of a hunch. (R: 47 G: 35 B: 65)

Purple Man and Freddy have a 62 pixel difference.
Purple Man and the crying corpses have a 81 pixel difference.

The Purple Guy in the easter egg in Fnaf4 has this code: #390054 – this sprite is extremely tall and lanky in appearance. He has white eyes and no smile, and instead of a badge, he has a single gold bar across his chest. He is 298 pixels tall. It’s hard to determine how tall he is in comparison to the other characters since none share the same distance from the ‘camera’, save for the employee in the spring bonnie suit, who stands 325 pixels tall. (R: 57 G: 0 B: 84)

Purple Man and Spring Bonnie have a 27 pixel difference.

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I would like to say that knowing what we know about FNAF4, I wonder if it's possible that the Pink Guy we see in the Foxy Go Go Go minigame (134 pixels tall) is actually a younger person than Purple Guy in "Follow Me" (157 pixels tall). The height difference suggests not quite a child (roughly 60-some pixels) but maybe a teenager? Maybe it's Crying Child's brother? He likes Foxy too, after all. It may also be a younger Purple Guy, though. (Of course, the "Phone Guy is Purple Guy" idea fits in with this as well, but I haven't taken a stance on that yet.)

I am a bit confused by the height of the animatronics compared to the people, however. They're always smaller, but that could be the souls of the dead children (or teenager's) interpretation of themselves as the characters. Thus older people being so much larger when that isn't true. (The dead children are always about half to two thirds of the Purple Guy(s) height, and the animatronics are close to the same in most instances.)

[Find Me in the Alps]

This shows a great amount of detail and research. Well done!
But on the other hand, I believe that the height varies just because it had to in the transition between games and minigames.
However, the shades of purple in purple guy, that IS a discussion point.