+def add_dark_color(line):
+ if not line.lower().startswith("\\set_color "):
+ return no_match
+ colre = re.compile(r'^\\set_color\s+("[^"]+")\s+("[^"]+")\s*$', re.IGNORECASE)
+ m = colre.match(line)
+ if not m:
+ return no_match
+ line += " " + m.group(2)
+ return (True, line)
+