Alternatively you can place a button over your image with a RGBA(0, 64, 116, 0.9) and set its hover fill to on hover set it to RGBA(0, 0, 0, 0).
So maybe for you you have a disabled button that reads "Hello" below and another button, that says "Gbye" on top of that that that, on hover the text fill goes from transparent to opaque. Both of these over each box you have?
Your launch or what not is on the button on top.