5.6 has 100% Red tone.

5.62 has 70% Red and 30% Beige.

5.66 is 200% Red for an intense red

6.64 is 70% Red and 30% Copper..

6.66 is 200% Red for an intense red.

7.64 is 70% Red and 30% Copper.

7.66 is 200% Red for an intense red.