First, I do apologize if I was a little "snarky" in my last reply. Bad night, but no reason for rudeness. I am also a little biased because I'm able to actually see the graphics on-screen, whereas all of you are actually just seeing screenshots, which I will admit take away from the visuals of the game for some reason.
What I mean is exactly that : The "floor" where you an walk is supposed to be dark, or at least darker than walls areas. If it cannot be made darker then it should at least be close enough to a single-colour area with little contrast in it.
I kind of agree with this, but I kind of don't. The floor in the screenshot you referenced is darker than the walls, and is a completely different color. Again, it could be different actually playing the game versus seeing a picture, but at least in-game I didn't have any problems understanding what was floor or wall. The castle floor tile is actually taken from Final Fantasy ++, which actually took the tile from FFIV (seen here in 2 different locations each)
Final Fantasy ++
Final Fantasy IV
In the first screenshot, Grond did make the castle floor a darker shade of grey than the wall grey (his carpet also had different trimmings). In the second, the castle floor is more of a blue/grey, and the walls are I believe the same color as what I've done. Also, the carpets use the same colors. In Final Fantasy IV, the floor was a dark brown, but the wall colors were very similar to my own. I'm not trying to replicate any of Grond's work, but this project is certainly done in the same spirit. It worked there, and I feel that it works again. If I have missed what you were saying, please feel free to elaborate or explain.
The purple floor is perfect, but the carpet is way too bright. It is absolutely not obvious that this carpet stands on the floor, and look like an obstacle. You should make it darker, so that it blends well with the purple floor, and do not blend with the brick walls. Ideally you'd add in a shadow of the walls as well, but that's not compulsory.
After looking at the FFIV screenshots I can see where the red might be just a little too bright, but it's the second darkest red choice that I have in the original game palette. Even changing it to the darkest red only changes it ever so slightly.
Only darker option
Since you've worked with FF1 NES yourself, you know the color choices are pretty piss poor in some colors, and that was the only red that wasn't either too orange or maroon for my liking. As an aside, bright colors (especially purple) were signs of wealth and nobility in olden days, and I was kind of going with that motif when I chose brighter colors for the carpets of the castles. Personally, I still like the lighter shade, but I'm going to try it with the darkest red and darkest blue since the two shades are already almost as close as they can be to that point, and see how it looks. Like I said, I can see what you meant in some respects. The shadow of the walls sadly I can't do anything about at this point. I have crammed as many tiles as I can into the available set for the castles and I honestly don't have another square (that's one reason the little windows in the castle walls don't all line up the same).
While I'm trying to respect the feel of the original Final Fantasy, I'm shooting for something more along the lines visually of Final Fantasy IV. I've actually been playing that game for inspiration when I get tired of beta testing. As I've been writing this for a bit now, I've played with some of the graphics in certain areas and I think that you might be right about some places. Here are some screen shots of some minor color alterations to Thorbardin/Dwarf Cave.
Ok, so sadly the Ice Cave screenshot wouldn't load, and I've spent way too much time on this already. Again, with the limited colors, I can't change the Ice Cave but so much. The lighter blues make the walls stand out to the point where they don't look like they fit. I tried instead to take away the white from the floor and make it more subdued as you suggested. The color limitations of the NES are making it difficult to change some things. Like the Marsh Cave, if I change the floor main color to any other green, it is either too dark or doesn't fit. Like I said, in-game a lot of this looks different. But I can see where some changes might have been necessary. Its all a learning experience. To end this post, here are 2 changes to locations that I made.
Marsh Cave B3