Fix ColorPickerElement and ColorPicker test (#10903)

testbench-api/src/main/java/com/vaadin/testbench/elements/ColorPickerPreviewElement.java

@@ -36,9 +36,8 @@ public class ColorPickerPreviewElement extends CssLayoutElement {
     public boolean getColorFieldContainsErrors() {
         List<WebElement> caption = findElements(
                 By.className("v-caption-v-colorpicker-preview-textfield"));
-        boolean noCaption = caption.isEmpty();
-        return noCaption ? noCaption
-                : caption.get(0).findElements(By.className("v-errorindicator"))
+        return  !caption.isEmpty() &&
+        !caption.get(0).findElements(By.className("v-errorindicator"))
                         .isEmpty();
     }
 

uitest/src/test/java/com/vaadin/tests/components/colorpicker/ValoColorPickerInputFormatsTest.java

@@ -77,7 +77,7 @@ public class ValoColorPickerInputFormatsTest extends MultiBrowserTest {
     public void testHSLAValue() {
         setColorpickerValue("hsla(120, 0, 50%, 0.3)");
 
-        assertEquals("#00ff00", previewElement.getColorFieldValue());
+        assertEquals("#808080", previewElement.getColorFieldValue());
     }
 
     @Test