Sanguine (adjective)

1. Optimistic or positive, especially in an apparently bad or difficult situation.
2. Having a reddish color, especially in the cheeks.

Origin:

From latin sanguineus "of blood" from sanguis "blood". the word was used in the 16th century to describe a person of a ruddy complexion, and later came to mean optimistic or cheerfully confident.

Examples:

1. He remained sanguine despite the setback.
2. The sanguine color of the sky at sunset.
3. Despite the bad news, she remained sanguine.
4. He was sanguine about the outcome of the election.
5. The sanguine color of the dawn.