Dolphin dumps these textures in an invisible format, and with good reason - the way the game rereads it is quite strange.
(From what I can tell, it flips the green and opacity values and ignores all other values. This is just a guess, though.)

If you really want to edit these, here's some color values that will help:
Visible: 0/77/0 RGB with 0.5% opacity
Invisible: 85/0/102 RGB with 50% opacity
(Thanks to Matrix2525 for finding the invisible values!)