1. Key 1 Key 2
Key 3 Key 4
Key 5 Key 6

2. Key 7 Key 8
Key 9 Key 10
Key 11 Key 12

3. Key 13 Key 14
Key 15 Key 16

4. Keys Normal Color Blindness
Key 1 12 12
Key 2 8 Red-green color blindness: 3
Key 3 29 Red-green color blindness: 70
Key 4 5 Red-green color blindness: 2
Key 5 3 Red-green color blindness: 5
Key 6 15 Red-green color blindness: 17
Key 7 74 Red-green color blindness: 21
Key 8 6 Color blindness: --
Key 9 45 Color blindness: --
Key 10 5 Color blindness: --
Key 11 7 Color blindness: --
Key 12 16 Color blindness: --
Key 13 73 Color blindness: --
Key 14 26
Red color blindness: 6
Green color blindness: 2
Key 15 42
Red color blindness: 2
Green color blindness: 4
Key 16 -- Red-green color blindness: 5