Fix errors in unnatural water palettes

[ZeeMaji]

This fixes two errors in the orange & acid & pink water palettes where they were modifying colors beyond the water colors.

Firstly, pink tones 2-6 are changed to be the same as natural water on a new separate object. The pink colors in the original orange/acid water palettes seem to have been accidentally leftover from an earlier development version of the game's palette as they appear in some evo of RCT screenshots. For the sake of visual backwards compatibility i've split the objects here since this impacts the looks of old parks with these palettes. The old object has no changes to the pink tones but are marked as compat objects, the new objects have the error fixed.

Secondly, the third to last color (a weird unused blue color) has been changed to the same value it is in the natural & green water palettes. This color seems to be entirely unused which shouldn't affect any parks visually so i've unified it across all the objects, even the now compat marked ones.

[ZeeMaji]

Marking as draft as pink water is also affected by the first issue, completely forgot to check it yesterday.
Fixed pink water.

[Gymnasiast]

I would prefer also leaving the weird blue as-is in the old objects. It doesn’t make a lot of sense to fix stuff in an object that is left in for compatibility, and I’m not 100% sure it is unused in the first place.

Another question I had was: what does RCT1 do if you set it to orange water? Does it use the same "broken" palette as RCT2 does, or the fixed one?

And finally: do you think we should have a special palette for RCT1 base game imports, considering it used different shades of yellow?

[ZeeMaji]

I would prefer also leaving the weird blue as-is in the old objects. It doesn’t make a lot of sense to fix stuff in an object that is left in for compatibility, and I’m not 100% sure it is unused in the first place.

They aren't referenced anywhere in the code from what I remember when I researched this a while back, the values correspond to the first three remap slots afaik and seemed like weird leftovers that ended up in the palette objects somehow.

Another question I had was: what does RCT1 do if you set it to orange water? Does it use the same "broken" palette as RCT2 does, or the fixed one?

Very interestingly, the pink palette change seems to be specific to RCT2, as both RCT1 palettes use the same pink tones that differ from what RCT2 has on it's natural water palette. I will need to adjust this PR for this find as we'll need an RCT1 natural water palette compat object to account for this.

RCT1:

OpenRCT2:

And finally: do you think we should have a special palette for RCT1 base game imports, considering it used different shades of yellow?

This is not possible to do, the palette is the same. It's just the way the dark yellow color is mapped is different in the RCT1 base game, I checked this myself because I was going to make an object for that years ago but it's just not a thing that can be replicated with current palette objects since it's particular to the mapping of the dark yellow color.

[ZeeMaji]

Alright, this should be ready for review again. I've undid the change to the unused blue on the old water objects and implemented a compat object for RCT1's natural water palette.

I did investigate further and found no other palette differences between RCT1 & RCT2 beyond an odd case with the # 374b4b color as it seems to have been introduced in RCT2 as it's slot in RCT1's palette corresponds to a seemingly unused # ff00ff placeholder.