Guys, this tileset was made for the general public, not a specific person or quest. Nothing about this set is set in stone, so if you need to change the colors of CSet 6 and Link's tiles, so his tunic turns all one color, or so you have some extra wiggle-room with other CSets, feel free! Just as if you want to add tiles, or strip some tiles out that you'd never use in a quest, or even alter them for your own specific use, you're free to do so.
On the flip side, this tileset was made for general use, and in a typical Zelda game, Link's tunic changes color at some point. While I am the one that made the Link tiles, and altered the original palette to allow for the second Tunic color (it was originally a couple shades of red, if I recall correctly), I personally feel that the creative options available with two different colors for Link's tunic outweighs the usefulness of having more colors per that specific CSet. Especially when 8-bit mode gives you ALL the available colors, and is still subject to the effects of CSet 6 changing colors based on rings.
That said, if most feel that CSet 6 would better benefit from having a couple additional colors, either red, blue, yellow, or what-have-you, it would be a simple fix to override the current Link tiles with versions that have only one green scale.
What I was talking about is the second gradient of green within cset 6. It doesn't seem to serve much of a purpose, does this have anything to do with the tunic tiles somehow?
It's been a while since I knew all this stuff by memory, but as far as I can see the second row of green colors are only being used by some of the swimming sprites, and even there it sees limited use, and making alternative tiles without using those few shouldn't be a big job. If we could change those, I wouldn't mind altering the swimming tiles unless you'd want to do that yourself.
I've changed those colors to yellow in this shot:
So yeah, unless I'm missing something obvious, we've got three colors here that could be used differently, right? Like I was saying earlier, my major issue with these colors is that they limit what I can do with the Zelda sprites, I've had a few goes at it, but I feel like I need at least one red color that'd go for orange if one wanted to use it with yellow for gold or something.