Final answer:
The correct jack color for connecting a microphone to a sound card is typically pink, which is the standard across most computer setups.
Step-by-step explanation:
When connecting a microphone to a sound card, the correct jack is typically the pink one. The pink jack is standardized for microphones across most computer and sound card manufacturers. Take care not to confuse it with the green jack, which is commonly used for headphones or speakers, or the blue jack, often reserved for line-in audio sources.