What are the best Luminance shades for gray hair?

The best Luminance shades for gray hair are those finished in 0 example: 8.0, 7.0 and 6.0, another excellent option is to choose shades with reflections 3, 4, 5 and 6 example; 7.3; 7.34; 7.36 or 6.35; and so on.