question: @ Deprecated public static byte matchColor ( Color color ) { if ( color . getAlpha ( ) < 128 ) return 0 ; int index = 0 ; double best = - 1 ; for ( int i = 4 ; i < colors . length ; i ++ ) { double distance = getDistance ( color , colors [ i ] ) ; if ( distance < best || best == - 1 ) { best = distance ; index = i ; } } return ( byte ) ( index < 128 ? index : - 129 + ( index - 127 ) ) ; }
target:  Get the index of the closest matching color in the palette to the given color.