Confusion with constructor of Color

Some constructors of the class Color take integer values for red, green, blure, and alpha. While the range of values vary from 0 to 255 which can be stored in just a byte type variable.
So why we are alocating extra memory by placing int type parameters in these constructors.
Can anyone please clearify it???
Regards

This is very simple code and there is no problem with code.
Code lines are
Color color=new Color(45,56,135);
JScrollPane spSelectedProps=new JScrollPane(lstSelectedProperties, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
spSelectedProps.setBorder(BorderFactory.createTitledBorder(spSelectedProps.getBorder(),"Properties",TitledBorder.LEFT,TitledBorder.TOP,new Font("verdana", Font.BOLD, 11),color));
spSelectedProps.setPreferredSize(new Dimension(width*30/100,height*67/100));
gbc.gridx=1;gbc.gridy=1;gbc.anchor=gbc.WEST;gbc.gridwidth=1;gbc.gridheight=2;
gbc.insets=new Insets(5,10, 0,0);
pnlContainer.add(spSelectedProps,gbc);
Thanks TimTheEnchantor for clearification
Regards

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