allow color to get a list/tuple

Author: ladyada

adafruit_rgb_display/rgb.py

@@ -45,10 +45,14 @@
 _BUFFER_SIZE = const(256)
 
 
-def color565(r, g, b):
+def color565(r, g=0, b=0):
     """Convert red, green and blue values (0-255) into a 16-bit 565 encoding.  As
     a convenience this is also available in the parent adafruit_rgb_display
     package namespace."""
+    try:
+        r, g, b = r  # see if the first var is a tuple/list
+    except TypeError:
+        pass
     return (r & 0xf8) << 8 | (g & 0xfc) << 3 | b >> 3