FULL PRODUCT VERSION :
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
SunOS oates 5.10 Generic_150400-30 sun4v sparc SUNW,SPARC-Enterprise-T5120 Solaris


A DESCRIPTION OF THE PROBLEM :
Our application is using swing. We built a 3D look button using a rectangle with a gradient fill. Since java 1.8, the color of a button is completely changed.
We use MetalLookAndFeel.
I can email the screen capture of our application.

REGRESSION. Last worked in version 7u80

ADDITIONAL REGRESSION INFORMATION:
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
   public static void fill3DGradient( Graphics g, int x, int y, int w, int h,
                                       Color dark, Color light )
    {
        Graphics2D g2 = (Graphics2D) g;
        Paint oldPaint = g2.getPaint(); // Make no net change to g

        g.translate(x, y);

        g2.setPaint(new GradientPaint(
                                      0, 0, dark,
                                      0, h/3, light
                                      )
                    );
        g2.fillRect( 0, 0, w-1, (h-1)/3 );

        g2.setPaint(
                    new GradientPaint(
                                      0, h/3, light,
                                      0, h, dark
                                      )
                    );
        g2.fillRect( 0, (h-1)/3, w-1, h-1 - ((h-1)/3) );

        g2.setPaint( oldPaint );

        g.translate(-x, -y);
    }


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
it is better to show you the screen capture.

REPRODUCIBILITY :
This bug can be reproduced always.