In the 2022 remake of Urusei Yatsura, Lum is given red/orange eyes.
In the original version of the anime/manga, she always had blue eyes.
It's a well-known fact that the hair color "change" thru the original 1981 serie is indeed deliberate - Lum was always intended to have rainbow-like, multicolored hair with a subtle color-changing effect as she moved, but since it was too difficult to animate at the time she was given simpler green hair. As animation techniques improved, her hair started to feature multiple shades and a subtle color changing effect but where kept green to not confuse fans - see later episodes or the "It's a Rumic World" commemorative video.
Yet, over all the years, Lum's eyes were always blue.
So the question is simple: do we know the reason behind the change in the remake?