If an effect allows you to spend mana as though it were mana of any color to cast Springmantle Cleric, you consider only the actual mana spent to determine how many counters it receives.

Colorless mana won’t give Springmantle Cleric another +1/+1 counter. Colorless is not a color.

If Springmantle Cleric enters the battlefield without being cast, it receives no +1/+1 counters.

If another creature enters the battlefield as a copy of Springmantle Cleric, consider what mana was spent to cast that creature to determine how many +1/+1 counters it enters with.