html colors

Is hex color #FFF   the same as #F0F0F0 or #FFFFFF ?

Why do some places use 3 digit color codes like this: #FFF
while other website uses 6 digit color codes like this #FFF000
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#fff is the same as #ffffff, the shortcut get expanded by replicating the digits for each of the three color segments.

Using the 3 digit format is simple a shortcut and jus one of the options for specifying colors.

it is also possible to use decimal values with and rgb format and to use colorname.

Chris StanyonWebDevCommented:
You can only use the 3 digit version if each set is repeated:

#abc = #aabbcc
#fff = #ffffff = black = rgb(0,0,0) = rgba(0, 0, 0, 1)

5 different ways of setting colours!

rgba is CSS3 and the extra bit (the a) if for alpha (transparancy) - 1 is opaque, 0 is transparent and anything inbetween is slightly see-through...

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