From a97800bdaf067f76a9eedad55a441fa25d8bb3dc Mon Sep 17 00:00:00 2001
From: Tiago Malheiro <tiagomalheiro.a@gmail.com>
Date: Sun, 31 Oct 2021 10:16:18 +0000
Subject: [PATCH] Handle case where Line chart getFillColor() is an array

---
 src/PhpSpreadsheet/Writer/Xlsx/Chart.php | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Chart.php b/src/PhpSpreadsheet/Writer/Xlsx/Chart.php
index c33169ab58..efbbb6c87c 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Chart.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Chart.php
@@ -1144,13 +1144,15 @@ private function writePlotGroup($plotGroup, $groupType, $objWriter, &$catIsMulti
                 if ($groupType == DataSeries::TYPE_STOCKCHART) {
                     $objWriter->startElement('a:noFill');
                     $objWriter->endElement();
-                } elseif ($plotLabel && $plotLabel->getFillColor() !== null) {
+                } elseif ($plotLabel) {
                     $fillColor = $plotLabel->getFillColor();
-                    $objWriter->startElement('a:solidFill');
-                    $objWriter->startElement('a:srgbClr');
-                    $objWriter->writeAttribute('val', $fillColor);
-                    $objWriter->endElement();
-                    $objWriter->endElement();
+                    if ($fillColor !== null && !is_array($fillColor)) {
+                        $objWriter->startElement('a:solidFill');
+                        $objWriter->startElement('a:srgbClr');
+                        $objWriter->writeAttribute('val', $fillColor);
+                        $objWriter->endElement();
+                        $objWriter->endElement();
+                    }
                 }
                 $objWriter->endElement();
                 $objWriter->endElement();