Are wearing colored contacts deceiving?

Let's say I got colored contacts, maybe a hint of a lighter color (brown) than my original color or a pop of green. Would you guys have a problem or be disappointed if a girl you may be dating told you they weren't her real eye color? And do you prefer a girl to tell you right off the bat, especially if you're complimenting her on her eyes, which aren't real?
Are wearing colored contacts deceiving?
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