MainActivity.kt

scope.launch {
    interactionSource.interactions.collect { interaction ->
    when(interaction) {
       PressInteraction.Press -> {
          val pressPos = pressPosition.x.coerceIn(0f..drawScopeSize.width)
          pressOffset.value = Offset(pressPos, 0f)
          val selectedHue = pointToHue(pressPos)
       }
    }
}