OnMouseEnter causes an object to disappear for some reason

Questions & Answers
1

I was trying to use OnMouseEnter and OnMouseExit to make a sprite change color when you have your mouse on or off it. OnMouseExit works as it should, but OnMouseEnter makes the object disappear instead of changing the color. Though when I hardcode the sprite to change to red in OnMouseEnter, it works fine. Here is the relevant part of the script:

public void OnMouseEnter()
    {
        //SprRender is a ref to the SpriteRenderer component
        SprRender.color = HighlightColor; //<- this somehow makes the sprite disappear
        
        //SprRender.color = Color.red; // <- this works as it should
        
    }

The skybox background is white, and the highlight color is blue, so I know it’s not the highlight color blending in with the background. Also, if it helps any, I’m using Unity 5.0.0f4.

2

How are you defining your HighlightColor?

The problem is that the alpha value of HighlightColor is set to 0.

If you are doing it something like this

public Color HighlightColor = new Color(0, 0, 0, 0);

then you are setting your transparency to 0. If you want to make the HighlightColor white you need to do it like this

public Color HighlightColor = new Color(0, 0, 0, 1);

or this

public Color HighlightColor = Color.white;

See the following Unity page for predefined color values