pybricks.parameters.Color.NONE: Set v=-30.

With the newly introduced color cost function, any measured value less than 50 results in Color.NONE, which makes it the predominant result. This reduces the distance range for the default colors.

Instead of adjusting all colors (which are also used to emit colors), we can make the value of Color.NONE negative to achieve a similar result.

pybricks/parameters/pb_type_color.c

@@ -68,7 +68,7 @@ const pb_type_Color_obj_t pb_Color_MAGENTA_obj = {
 
 const pb_type_Color_obj_t pb_Color_NONE_obj = {
     {&pb_type_Color},
-    .hsv = {0, 0, 0}
+    .hsv = {0, 0, -30}
 };
 
 const pb_type_Color_obj_t pb_Color_BLACK_obj = {