There are many things which can go inside the head tag. But since it's the beginning we only put the title inside the head. It appears at the very top of the top of the screen in the taskbar. This tag is responsible what the overall look of your site will be. It sets the background color or image, text and link color, and visited link color.
Attributes are what really make HTML tags shine.
Hex numbers are numbers given to colors. Anyway, adding aattributes to tags is a piece of cake. Page information goes in here. With lots of interesting stuff.