Final answer:
The initial color of the 2,6-dichloroindophenol solution is dark blue, which can change with pH variations.
The correct option is c. Dark blue
Step-by-step explanation:
The color of the 2,6-dichloroindophenol solution initially is dark blue. Acid-base indicators such as 2,6-dichloroindophenol are organic compounds that change color at a particular pH level due to a change in the hydronium ion concentration.
The initial dark blue color of 2,6-dichloroindophenol will change under different pH conditions, which is why it is used as an indicator in various chemical and biological assays.