coloured glass

There is an idiomatic expression in English, "looking at the world through rose-coloured glasses." It means that one is always taking the optimistic, "rose-coloured" view of life. I have never seen that expression turned around, however, the way that you propose.

First I'd like to say thank you. Sorry to bother you again.
Here is another version "don't judge people through coloured-spectacles"
Does it make sense to you?

Yes, it makes sense although it is not a common expression that one hears very often. 'Spectacles', of course, is just another word for 'eyeglasses.' The meaning of that sentences is that one should not have pre-conceived notions about people, should not look at them through spectacles of a particular coloration but, rather, see them clearly.

Did you see my reply on your other thread on the same topic?

the common english phrase for that situation is "don't judge a book by it's cover"

I saw it. Thanks!

That one I know