Fragment highlight color adjustments

Author: ahmetsait

scss/github-markdown-dark.scss

@@ -99,3 +99,15 @@
 	transition:
 		border-top-color 0.2s ease-in-out;
 }
+
+@keyframes fragment-highlight {
+	0% {
+		box-shadow: 0 .25em 0 0 #000000;
+	}
+	50% {
+		box-shadow: 0 .25em 0 0 #004073;
+	}
+	100% {
+		box-shadow: 0 .25em 0 0 #000000;
+	}
+}

scss/github-markdown.scss

@@ -637,13 +637,13 @@
 
 @keyframes fragment-highlight {
 	0% {
-		box-shadow: 0 .25em 0 0 #0366d600;
+		box-shadow: 0 .25em 0 0 #ffffff;
 	}
 	50% {
-		box-shadow: 0 .25em 0 0 #0366d644;
+		box-shadow: 0 .25em 0 0 #91bced;
 	}
 	100% {
-		box-shadow: 0 .25em 0 0 #0366d600;
+		box-shadow: 0 .25em 0 0 #ffffff;
 	}
 }