Cold of complexion, good of condition.

The saying pairs a cool temperament with a good disposition. Someone can be restrained in manner while remaining kind and agreeable toward others.

It distinguishes a person's temperament from their character: reserve need not be mistaken for unkindness. The two qualities are presented as compatible, not as cause and effect.

Use the proverb to describe a calm or reserved person who is nevertheless good-natured. It is especially apt when someone's quiet manner might otherwise be mistaken for a lack of warmth.