A simple way to light up the keyboard in uniform colors, depending on what layer one’s on. Unlike Colormap, all keys will be the same color. But this plugin uses considerably less resources, and is easier to set up as well. A perfect solution when one wants to quickly see what layer they’re on, with minimal resources and time investment.

Using the plugin

To use the plugin, one needs to include the header, and activate the effect. Then, one needs to configure a color map:

#include <Kaleidoscope.h>
#include <Kaleidoscope-LEDControl.h>
#include <Kaleidoscope-LED-ActiveLayerColor.h>


void setup () {
  static const cRGB layerColormap[] PROGMEM = {
    CRGB(128, 0, 0),
    CRGB(0, 128, 0)


Plugin properties

The plugin provides the LEDActiveLayerColorEffect object, which has the following method:


Sets the colormap to the supplied map. Each element of the map should be a cRGB color, and the array must have the same amount of items as there are layers. The map should reside in PROGMEM.


Further reading

Starting from the example is the recommended way of getting started with the plugin.