Final answer:
In the resistor color code, the digit 6 is represented by the color blue. The correct answer is option 2.
Step-by-step explanation:
The color that represents the digit 6 in the resistor color code is blue. The resistor color code is a system used to denote the resistance values of resistors based on the colors of the bands around the resistor. Typically, the first two bands represent the first two significant digits of the resistor's resistance value, the third band represents the multiplier, and the fourth band represents the tolerance.