Material editor displays inaccurate colors

There's some weirdness going on where the color shown for color fields in material editor does not correspond to what actually ends up rendered to the screen in the material preview and in the built game, even when the shader just copy pastes the input color into the fragment color. I assume it's some sort of a sRGB vs linear color space issue.

If it's not obvious enough to the naked eye, color in the material preview top left is #ffe700 and the color displayed next to the "Color" field is #ffcc00. Given that the color value that I've set corresponds to #ffcc00, this might even be an issue with the way jME passes colors into shaders/deals with gamma correction.

Reproduce the mismatch in the material editor's color field, material preview, and built game using the shader case that copies the input color into fragment color. Trace the color through the editor, preview, and shader/rendering path, checking the reported sRGB-versus-linear behavior. Done means the displayed and rendered colors agree; no file or test is named in the issue.