Pretty much, yeah. I already changed that.
Also, although this is slightly off-topic, I don't think this specifically deserves it's own topic, but... It's a thing that sort of messed with me several times years ago... For some reason, despite R'n'D's palette, despite being "consistent", isn't that consistent. Let me explain.
Let's open few texture files of R'n'D in any image editing software, which is PaintDotNet in my case (it can be even just MS Paint, whatever). I opened RocksElements and RocksSP. Now what we need is the color pick tool to... well, pick colors. Basically, the idea is picking same colors from every file. My first choice was on the bright yellow.

- a1.png (138.82 KiB) Viewed 13961 times

- a2.png (161.54 KiB) Viewed 13961 times
Picking one as primary and other as secondary colors, here's the result:

- b1.png (113.13 KiB) Viewed 13961 times
Yeah, for some reason seemingly same color is just slightly different in different files. Here they are side by side:

- b2.png (9.88 KiB) Viewed 13961 times
And that's just one of few examples.
Besides that, some sprites, especially explosions and acid, contain several colors that are not really used anywhere else, mostly weird shades of brown and... greenish orange or something? I don't really get it...

- c1.png (265.52 KiB) Viewed 13961 times
Even weirder, the RocksCollect is the strangest of all because it is the only texture file in the game (aside from the app icon) that is translucent and that uses actual blurry sprites unlike usual black '#000000' background.

- c2.png (72.01 KiB) Viewed 13961 times
Around two months ago, I got an idea on trying to collect all sprites, remove most of the duplicates and just gather all of them into one huge 2048x2048 atlas and also modify all of them to have them share one solid palette. In the end, aside from RocksCollect, I managed to not just fit all of them, but also have a lot of free space to spare, possibly for the fixed collecting animations and probably even more.

- d1.png (1.32 MiB) Viewed 13961 times
I mean, this is just for a proof of concept, but practically, this is obviously useless nowadays for the game (aside from fixing the palette).