Color

Shapes have a fill color and and a stroke color. There are many pre-defined colors. Here are just a few. See the Oracle documentation for more.

Color.RED        Color.WHITE 
Color.PINK       Color.BLACK     
Color.ORANGE     Color.GRAY    
Color.YELLOW     Color.DARK_GRAY   
Color.GREEN      Color.LIGHT_GRAY 
Color.BLUE       Color.BEIGE 
Color.MAGENTA    Color.BROWN 
Color.CYAN       Color.CORNFLOWERBLUE
Color.DARKBLUE   Color.DARKGREEN
Color.FUCHSIA    Color.GOLD
Color.LIGHTBLUE  Color.LIGHTGREEN
Color.MAGENTA    Color.PURPLE
.....
Color.TRANSPARENT

These are static values from the class Color. These colors are completely opaque, except for Color.TRANSPARENT.