Well you or I might not like to admit it, but Ike is apparently one of those characters that you just can't seem to nail right. I don't mind giving advice or constructive criticism, but I also don't like having to be a pain in the butt and tell you it doesn't look good every time you put up another preview.
The thing about brown is that it works well when the part you're trying to edit was brown to begin with in the first place. Take Link's boots for example. If you made them red on his Brawl red outfit, do you think it would look good or bad? Brown helps bring out a slight warm and naturally complimenting feeling that would otherwise be missing from most of these textures, which are primarily cold colors (blue, indigo, purple) with blacks, whites, and greys.
For me, it's not very hard for me to visualize his default outfit with a color scheme centered around the primary indigo color that most Mirage textures are using.
If I started from scratch on his default textures, here's what I'd do:
-Indigo/midnight blue for the tunic
-Midnight blue/dark blue for the inner tunic, feet, and outer cape
-Pale blue for the inner cape
-Coffee for the gloves, boots, chest plate, and left shoulder plate
-Silver with a very small blue tint for the metal parts on the gloves and boots, the buckle on his chest plate, and the metal tips of his feet
-Coffee/Lion for the pants
-Black for the headband and sash under his belt
-Leave his hair, skin, and sword alone
And honestly, if you're feeling like you're struggling or can't get it right, maybe you should put it off for a while and try working on something else, then come back to it when you feel you have a good grasp of what needs to be done.
I might also decide to whip up a version of my Mirage Ike really quick later tonight or tomorrow.
And I went ahead and made this just for you guys.
Just keep in mind, I'm not saying browns are required or necessary, but they can help out a bit by giving the texture a slightly more natural look.