Final Tweak (I Think)

Author: oleibman

samples/templates/32readwriteScatterChart3.xlsx

@@ -306,7 +306,7 @@ private function writeChartTextColor(XMLWriter $objWriter, ?ChartColor $underlin
                 $objWriter->writeAttribute('val', $value);
                 $alpha = $underlineColor->getAlpha();
                 if (is_numeric($alpha)) {
-                    $objWriter->startElement('a:alpha');
+                    $objWriter->startElement($prefix . 'alpha');
                     $objWriter->writeAttribute('val', ChartColor::alphaToXml((int) $alpha));
                     $objWriter->endElement();
                 }

src/PhpSpreadsheet/Writer/Xlsx/StringTable.php

@@ -262,6 +262,7 @@ public function testScatter3(): void
         self::assertNotNull($chartColor);
         self::assertSame('000000', $chartColor->getValue());
         self::assertSame('srgbClr', $chartColor->getType());
+        self::assertSame(50, $chartColor->getAlpha());
 
         $plotArea = $chart->getPlotArea();
         self::assertNotNull($plotArea);