Update BackgroundFormData.xml

Author: manjusha729

app/code/Magento/PageBuilder/Test/Mftf/Data/BackgroundFormData.xml

@@ -211,7 +211,7 @@
         <data key="rgb">rgb(63, 123, 126)</data>
         <data key="hex">#3f7b7e</data>
         <data key="rgbaCenterOfLightDarkSlider">rgba(64, 128, 127, 0.5)</data>
-        <data key="rgbaCenterOfLightDarkSliderRegex">^rgba\(63,\s*123,\s*126,\s*0.49(\d+)\)</data>
+        <data key="rgbaCenterOfLightDarkSliderRegex">^rgba\(63,\s*125,\s*127,\s*0.49(\d+)\)</data>
     </entity>
     <entity name="PageBuilderBackgroundColor_Invalid" type="pagebuilder_background_color_property">
         <data key="name">Background Color</data>