The battery I received, is not the same color as the one on the website.

No worries, sometimes replacement batteries will vary in color, depending on inventory. They may arrive in a variety of colors. The image on our website is a standard battery, but as long as your battery says it is model 18650 3.7 V, it will work. If you experience any trouble or have additional questions, please reach out to our Customer Care team and they will be happy to help!