# TriColor The `TriColor` effect extension is a part of the [`LEDEffects`][plugin:ledeffects] library, not a stand-alone base library of its own. It is used to implement the effects in that library. [plugin:ledeffects]: LEDEffects.md It is a class that can be used to create LED effects that all follow a similar pattern: alphas and similar in one color; modifiers, special keys, and half the function keys in another, and `Esc` in a third (this latter being optional). If we have a color scheme that follows this pattern, the `TriColor` extension can make it a lot easier to implement it. ## Using the extension Because the extension is part of the [`LEDEffects`][plugin:ledeffects] library, we need to include that header: ```c++ #include <Kaleidoscope-LEDEffects.h> ``` Then, we simply create a new instance of the `TriColor` class, with appropriate colors set for the constructor: ```c++ kaleidoscope::plugin::TriColor BlackAndWhiteEffect (CRGB(0x00, 0x00, 0x00), CRGB(0xff, 0xff, 0xff), CRGB(0x80, 0x80, 0x80)); ``` The first argument is the base color, the second is for modifiers and special keys, the last one is for the `Esc` key. If the last one is omitted, the extension will use the modifier color for it.