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background:#777777 none repeat scroll 0 0;

the 5 attributes it includes are background-color,background-image,background-repeat,background-attachment and background-position.

My question is:

Are background-repeat,background-attachment and background-position useless if background-image is none? Because according to the document,these are all used to change background-image.

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3 Answers 3

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yes. They have no meaning without that.

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2 Comments

So it's a waste of code,right? The same as background:#777777 none?
yes. If you just want to set the background color, you can just do background-color: #777777;
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You can simply write 

background:#777777;

or,

background-color:#777777;

All of those attributes affect the image only.

In general, if a CSS attribute sets multiple values (eg, background, border, font), you don't need to specify all of the values; any values you don't specify will be left at their defaults.

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oh,background:#777777; this version is more compact than background:#777777 none
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IF you just want a background color, consider using the background-color attribute instead of background.

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Though keep in mind, background-color will not override a background-image set elsewhere...

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