I just used light out of reflex talking about lights but it can be any service call triggered from the input_select
alias: Kitchen Light Color
description: ''
trigger:
  - platform: state
    entity_id: input_select.drop_down
    to: "blue"
condition: []
action:
  - service: remote.send_command
    target:
      entity_id: remote.wi_fi_ir_remote_remote
    data:
      device: Under Cabinet Lights
      command: 'command.for.blue'
mode: single
Now to set it up for alexa, from last I read was not straight forward. I have this thread bookmarked. You set up a dimmer in alexa and then set each step of the dimmer to a different command.
You should edit the title, these are not infrared lights and add alexa.