Get in the goddamn cuckshed
If I remember correctly, I thought that, namely the picture from the back, wasn't Dream. The stans for a long while thought it was George because the hair was so dark and pretty much none of them believed it was him. He also never outright stated that it was him in the photos, which I believe had some stans saying it was his brother or SapNap in the photoshoot? They were mainly saying those things because he didn't have golden blonde hair, plus he was saying at the time that he had "long shoulder length hair"
So even if it's not Coleton, based on his hair color and what Dream himself was describing himself as at the time, it couldn't be him. Unless he somehow forgot his own self description he gave the stans, which in all honesty, Dream lying is nothing new.
After that discussion however, most of Dream's other selfies did not include hair in them, such as the Mr Beast video, the other merch drops. Recently I believe this has been the most hair photos he's shown. I could be very wrong on this, I try to avoid seeing pictures of him.
Altho honestly, the instagram picture from August seventh would not surprise me if that's actually him. Since it's hard to hide fat, or even the overall shape of your body after losing a good bit of weight after being that large, him being slouched over like that would hide any evidence of not being a skinny twink. Also wearing black is made to slim you down, which would explain the full length gloves, which might also be slimming for the fingers in the process.
That photo being him is also more reasoning for the July photoshoot not being him as his hair color, even in the non-lit areas, is pretty much the same as his actual photo and his previous "hair color reveal", where as the person modeling on July 21st is being hit by sunlight and still has dark brown hair.