Alpha number changes in color but doesn't seem to apply to object

Questions & Answers
1

I am new to coding and unity, I have looked on the forums and have found similar issues, but none of the fixes I have tried(so far) have worked. What I am trying to accomplish is when I click on an object, I want to have that object fade. When I select it again, I want it to show up normally (alpha 255). Here is the c# code I am using:

public void OnPointerDown (PointerEventData eventData)
{
Debug.Log (“on pointer down”);
GameObject gameState = GameObject.Find(“Game State”);

	if(eventData.button != PointerEventData.InputButton.Left){
		return;
	}
	if(gameState.GetComponent<gameState>().gameStage == 1){
		if(gameState.GetComponent<gameState>().selected <2 && 
                       cardSelected == false){
			Debug.Log (this.transform.name +" Selected");
			cardSelected = true;
			color.a = 100f;
			this.GetComponent<Image>().color = color;
			Debug.Log (this.GetComponent<Image>().color.a);
			if(selectorIndex<1){
				gameState.GetComponent<gameState>().selected++;
				selectorIndex++;
			}
		}else{
			Debug.Log (this.transform.name +" Deselected");
			cardSelected = false;
			if(gameState.GetComponent<gameState>().selected>0){
				Debug.Log ("Normal alpha applied");
				color.a = 255f;
				this.GetComponent<Image>().color = color;
				Debug.Log (this.GetComponent<Image>().color.a);
				if(selectorIndex<0){
					gameState.GetComponent<gameState>().selected--;
					selectorIndex--;
				}
			}
		}
	}
}

When debugging I can tell the alpha number has changed, but it doesn’t appear to apply to the object in the game window… I can only guess I am not properly applying the value somehow, or missing a setting somewhere. There isn’t any code that affects the color of the object except for this. Anything helps thanks.

2

Each color component is a floating point value with a range from 0 to 1.

http://docs.unity3d.com/ScriptReference/Color.html

And the material needs a shader that supports transparency.