 <p>I found the answer. I finally broke down and downloaded the ROM and extracted the bitmaps with NAPIT. (btw: staring at extracted ROM bitmaps is really bloody hard on your eyes!)</p> <p>I matched a few bitmaps and end-results <a href="http://img405.imageshack.us/img405/9396/finalfantasy2.gif" rel="nofollow noreferrer">here</a>.</p> <p>Each character has a color that is mostly relegated to top part of the sprite so I chased that idea a while. It turns out that's a red herring. Comparing the in-game sprites vs. the color masks, you can see that black and transparent use the same color mask. Therefore, <em>IF</em> a black outline is shown, then it must be on a separate layer. However, despite the black outlines on the sprite-sheet, I can't find any real examples of black outlines in the game.</p> <p><a href="http://www.youtube.com/watch?v=Tx0c7jXbA_E" rel="nofollow noreferrer">Here's a video on YouTube</a> with lots of good examples. When you are on the blue background screen (@ 0:27), the outlines and the black mage's face are the blue of the background (ie: there is no black outline, it's transparent). In combat, the background is black. @ 1:46 a spell is cast that makes the background flash grey. All black areas, including outlines and black eyes, flash grey. Other spells are also cast around this part of the video with different colors of flashes. The results are the same.</p> <p>The real answer is that the black outlines on the sprite sheet don't seem to exist in the game. Whoever made the sprite sheet took the screenshots with a black background and scrubbed the background away.</p>