A click box is by defnition invisible; you use its Success event to show a previously hidden drawing shape (with the tint you want) or a highlight box. And if you want to be able to hide it when another one is clicked, you'll probably need a conditional action that hides previously shown shapes (or highlight boxes). I have plenty of examples on my blog; have a look at this old post (was for CP5.5), where you can request a template:
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