If you have deep-set eyes, then you should not apply eyeshadow to your eye crease, as it will make your eyes appear deeper, which in turn, give an ugly look. If you have small eyes or close-set eyes, then try to use lighter colours compared to the one you used on the eyelids. It will give you an illusion that the eyes are apart from each other. In the meantime, if you have almond shape eyes, then you should do the other way around. Use dark colours on the crease, which will give your eyes a dramatic look.
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Choose the colours that can go with the overall tone and structure of your face. You can experiment with different colours. Testing the colours on the back of the palm is a wise thing to do, before testing on the crease of your eye.
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Take a makeup brush and take a small amount of the colour that you plan to use on your crease. Rub the brush back and forth, until you get the desired result. If you want to have a bolder look, then you can increase the effect of the colour by using damp brush. It will allow the colour to be applied in a brighter way, giving you a dramatic look.
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