diff --git a/plugins/convertColors.js b/plugins/convertColors.js
index 48858f2b7..aa9c8fa77 100644
--- a/plugins/convertColors.js
+++ b/plugins/convertColors.js
@@ -6,7 +6,7 @@ export const description =
   'converts colors: rgb() to #rrggbb and #rrggbb to #rgb';
 
 const rNumber = '([+-]?(?:\\d*\\.\\d+|\\d+\\.?)%?)';
-const rComma = '\\s*,\\s*';
+const rComma = '(?:\\s*,\\s*|\\s+)';
 const regRGB = new RegExp(
   '^rgb\\(\\s*' + rNumber + rComma + rNumber + rComma + rNumber + '\\s*\\)$',
 );
diff --git a/test/plugins/convertColors.01.svg.txt b/test/plugins/convertColors.01.svg.txt
index 90aa8c0da..3f4c72a5b 100644
--- a/test/plugins/convertColors.01.svg.txt
+++ b/test/plugins/convertColors.01.svg.txt
@@ -1,6 +1,7 @@
 <svg xmlns="http://www.w3.org/2000/svg">
     <g color="black"/>
     <g color="BLACK"/>
+    <path fill="rgb(64 64 64)"/>
     <path fill="rgb(64, 64, 64)"/>
     <path fill="rgb(86.27451%,86.666667%,87.058824%)"/>
     <path fill="rgb(-255,100,500)"/>
@@ -12,6 +13,7 @@
     <g color="#000"/>
     <g color="#000"/>
     <path fill="#404040"/>
+    <path fill="#404040"/>
     <path fill="#dcddde"/>
     <path fill="#0064ff"/>
 </svg>