Table 1.

pH indicator and water solutions for producing desired colors

Spot color	Thymolphthalein	Phenolphthalein	Water
Intense blue	500 μL	0 μL	0 μL
Intense red	0 μL	500 μL	0 μL
Intense purple	250 μL	250 μL	0 μL
Light blue	100 μL	0 μL	400 μL
Light red	0 μL	100 μL	400 μL
Clear	0 μL	0 μL	500 μL