No, don't change the whole thing. I mean keep the light blue from before, but use the new dark blue. You changed the brightness of the whole thing, but that didn't help the contrast. Here:
I changed the color palette; the hue for the dark parts of X's armor are blue and the light parts are cyan, but you had the hues switched. I also tweaked some of the outlines and fixed the parts where the shading looked kind of banded and not round. The head also needed to be moved back one pixel, and I added selout where it was missing. In Sonic Advance style, the black outlines are only used around dark pixels, and the black should be (16, 16, 16), unless you're using Sonic Battle colors, in which the black is (32, 32, 32). I included both for you to see.
Hope that looks better to you. If you wanna build off my changes, feel free to; it's only one frame, anyway. If it's alright, could I use these sprites when they're done? I think they look pretty sweet, and they mesh well with my existing style.
I changed the color palette; the hue for the dark parts of X's armor are blue and the light parts are cyan, but you had the hues switched. I also tweaked some of the outlines and fixed the parts where the shading looked kind of banded and not round. The head also needed to be moved back one pixel, and I added selout where it was missing. In Sonic Advance style, the black outlines are only used around dark pixels, and the black should be (16, 16, 16), unless you're using Sonic Battle colors, in which the black is (32, 32, 32). I included both for you to see.
Hope that looks better to you. If you wanna build off my changes, feel free to; it's only one frame, anyway. If it's alright, could I use these sprites when they're done? I think they look pretty sweet, and they mesh well with my existing style.