It was just a white lie.
→선의의 거짓말이였어!

※ a white lie : 선한 (악의없는) 거짓말.

〔예문〕
A : Why did you tell Sheila that she was smarter than you?
     왜 너는 실리에게 너보다 실리가 더똑똑하다고 말했어?

B :It was just a white lie to maker her feel better.
    그녀를 기분좋게 해주기위한 의례적인 거짓말이였어!