Welcome to DF. One of the functions of this site is harm reduction
. It is not possible to identify unknown pills or capsules, what you have is an unknown drug
. Colour and appearance can be identical, while the active ingredients can differ. It is risky to take unidentified drugs
. Do you know the name of this drug?
If you have the original packaging there will be a patient information leaflet and the name of the drug in question. The safest thing to do with an unknown drug is to responsibly dispose of it, so that yourself or others will be not be tempted to use it.