A group of different client tests failed for varying reasons , many of which relate to colour:

javax/swing/text/html/StyleSheet/bug4936917.java
javax/swing/plaf/metal/MetalGradient/8163193/ButtonGradientTest.java
javax/swing/JInternalFrame/8160248/JInternalFrameDraggingTest.java
javax/swing/JInternalFrame/8069348/bug8069348.java
java/awt/Robot/HiDPIScreenCapture/ScreenCaptureTest.java
java/awt/Robot/CheckCommonColors/CheckCommonColors.java
java/awt/ColorClass/AlphaColorTest.java
java/awt/AlphaComposite/WindowAlphaCompositeTest.java

Possibly related to the cursor capture problem discussed in JDK-8252813.