Why my unity have low graphics and when I watch tutorial his unity is black and mine is white. Can someone help me?

Why my unity does not have good graphics when I watch tutorial people have black option panel and me the option panel is white?

The free version of unity has a white skin, whereas the paid versions give you a dark skin. You can make you game’s graphics look way better with this asset from the asset store:

here’s a video that explains how to use it and what all the options inside it mean:

hope it helps!