Příklad z článku: PHP Převod z hex do rgb a naopak

from hex to rgb ffffff: Array ( [0] => 255 [1] => 255 [2] => 255 )
from rgb to hex: #000000

from hex to rgb #ffffff: Array ( [0] => 255 [1] => 255 [2] => 255 )
from rgb to hex: #000000

from hex to rgb fff: Array ( [0] => 255 [1] => 255 [2] => 255 )
from rgb to hex: #000000

from hex to rgb #fff: Array ( [0] => 255 [1] => 255 [2] => 255 )
from rgb to hex: #000000