add support for alpha_hex

Author: chrishoage

pywal/util.py

@@ -54,6 +54,11 @@ def alpha_dec(self):
         """Export the alpha value as a decimal number in [0, 1]."""
         return int(self.alpha_num) / 100
 
+    @property
+    def alpha_hex(self):
+        """Export the alpha value as a hexdecimal number in [00, FF]."""
+        return "%02X" % (int(int(self.alpha_num) * 255 / 100))
+
     @property
     def decimal(self):
         """Export color in decimal."""