You can style the background of an element in one declaration with the backgroundproperty.
background: #ffffff url(path_to_image) top left no-repeat fixed;
Values:
attachment
color
image
position
repeat
Or you can set each property individually
Background Attachment
If you are using an image as a background. You can set whether the background scrolls with the page or is fixed when the user scrolls down the page with the background-attachmentproperty
background-attachment: value;
Values:
fixed
scroll
Background Color
You can specifically declare a color for the background of an element using the background-color property.
background-color: value;
Values:
color name
hexadecimal number
RGB color code
transparent
Background Image
You can set an image for the background of an element using the background-imageproperty.
background-image: url(path_to_image);
Values:
url
none
Background Position
You can position an image used for the background of an element using the background-position property.
background-position: value;
Values:
top left
top center
top right
center left
center center
center right
bottom left
bottom center
bottom right
x-% y-%
x-pos y-pos
Background Repeat
You can set if an image set as a background of an element is to repeat (across=x and/or down=y) the screen using the background-repeat property.