Color theory will not change the true value of color if they using it right (and if the base color is right). Light and dark not supposed to make her hair greenier, it's lighter (more yellow) in day and supposed to look greyish/bluish dupe at night.. Not make the the color green pops up. But maybe this is the way of the artist use color prolly, after all every artist has different concept in their head. Welp( ̄∇ ̄")

Her hair color supposed to be lime blonde.. Not green ╥﹏╥.. She's become greenier every chapter. She still looks pretty tho, but it almost threw me off everytime the old art (past) appear.. It looks like a different person mentioned