Because the uploader or who translated before them decided to poorly color some panels I guess ┑( ̄Д  ̄)┍ ira707
I highly doubt it was a uploader considering that they can't even put a text in a centre of speech bubble, nevermind cleaning. I think some spanish scans are the one who did it.
why did it switch to black and white to color then back to color then back to black and white ( ̄∇ ̄")