[CLEANUP] Avoid magic method forwarding in Color

Part of #1147

config/phpstan-baseline.neon

@@ -294,24 +294,6 @@ parameters:
 			count: 1
 			path: ../src/Value/CalcRuleValueList.php
 
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:implode\(\)\.$#'
-			identifier: method.notFound
-			count: 2
-			path: ../src/Value/Color.php
-
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:spaceAfterListArgumentSeparator\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/Value/Color.php
-
-		-
-			message: '#^Call to an undefined method Sabberworm\\CSS\\OutputFormat\:\:spaceBeforeListArgumentSeparator\(\)\.$#'
-			identifier: method.notFound
-			count: 1
-			path: ../src/Value/Color.php
-
 		-
 			message: '#^Call to method Sabberworm\\CSS\\Value\\Color\:\:hasNoneAsComponentValue\(\) with incorrect case\: HasNoneAsComponentValue$#'
 			identifier: method.nameCase

src/Value/Color.php

@@ -383,11 +383,12 @@ private function renderInModernSyntax(OutputFormat $outputFormat): string
             unset($componentsWithoutAlpha['a']);
         }
 
-        $arguments = $outputFormat->implode(' ', $componentsWithoutAlpha);
+        $formatter = $outputFormat->getFormatter();
+        $arguments = $formatter->implode(' ', $componentsWithoutAlpha);
         if (isset($alpha)) {
-            $separator = $outputFormat->spaceBeforeListArgumentSeparator('/')
-                . '/' . $outputFormat->spaceAfterListArgumentSeparator('/');
-            $arguments = $outputFormat->implode($separator, [$arguments, $alpha]);
+            $separator = $formatter->spaceBeforeListArgumentSeparator('/')
+                . '/' . $formatter->spaceAfterListArgumentSeparator('/');
+            $arguments = $formatter->implode($separator, [$arguments, $alpha]);
         }
 
         return $this->getName() . '(' . $arguments . ')';