How to set the led color for a single key in a macro?

Programming
1

Is there a way to switch the led color of a single key in a macro?

Here is my use case: I wanted to try SpaceCadet, but I also use OneShot. I was able to get them to work in turns by creating a macro that alternates which of the two is enable/disabled at a given time. Everything works well, except that if I forget in which mode I am in, I need to press a modifier key and check it the color of that key changed (OneShot + ActiveModColor). I would like to have my macro also change the color of a switch (probably led) so I know which mode I am in without having to touch the keyboard.

If you want to see my sketch, it is on GitHub - lgnakano/KeyboardioSketches: Keyboardio Sketch

2

I found a solution, but I am not sure if this is optimal.
I created a new layer that has only one key that is not transparent, and that is the key that I am using to trigger the macro, but on this new layer, it has a different macro, eg:

[PRIMARY] = KEYMAP_STACKED
(
...
M(MACRO_SWITCH_SPACE_CADET)
...
),

[SECONDARY] = KEYMAP_STACKED
(
...
M(MACRO_SWITCH_SPACE_CADET2)
...
),

Both macros trigger the same function:

const macro_t *macroAction(uint8_t macro_id, KeyEvent &event) {
  switch (macro_id) {
...
    case MACRO_SWITCH_SPACE_CADET:
    case MACRO_SWITCH_SPACE_CADET2:
      toggleSpaceCadet(event.state);
    break;
...
   }
}

The function toggles the layer together with the status of SpaceCadet and OneShot:

  static void toggleSpaceCadet(uint8_t key_state) {
	  if (keyToggledOn(key_state)) {
		  OneShot.toggleAutoOneShot();
		  if (SpaceCadet.active()) {
                      SpaceCadet.disable();
                      Layer.move(PRIMARY);
		  }
		  else {
                     SpaceCadet.enable();
                      Layer.move(SECONDARY);
		  } 
	  }
  }

Since I use custom colors in FunctionalColor for some keys, I just defined the macros to have different colors:

FC_START_COLOR_LIST(customColors)
    //// // Set the color of keys with brightness macros
    //// // Use any number of FCGROUPKEYs above a FC_KEYCOLOR to set several keys to the same color

    FC_KEYCOLOR(M(MACRO_SWITCH_SPACE_CADET), dim(greenyellow, 255))
    FC_KEYCOLOR(M(MACRO_SWITCH_SPACE_CADET2), dim(skyblue, 255))
    FC_KEYCOLOR(Key_CapsLock, dim(purple,128 ))
    FC_END_COLOR_LIST_DEFAULT(dim(forestgreen, 255));

  FunctionalColor funColorCustom(FC_COLOR_LIST(customColors));

Let me know if you know of a better solution, as this seems to use quite a bit of extra memory.