How can I Output a pixle value from a jit.lcd
You're looking at the values in plane 0 only, which is the alpha channel (ARGB), which is always at its maximum value in your case. Your color is encoded in planes 1, 2 and 3 (R, G and B respectively). Send a "plane -1" to your [jit.cellblock] to see all planes at the same time (or "plane 2" if you just want to see the G channel for example).