淡灰色都描绘不出的悲痛
[dàn huī sè dōu miáo huì bù chū de bēi tòng]
The name 'Even light gray cannot paint such grief' suggests profound sadness and despair beyond description. The color gray here represents sorrow, indicating this person might be carrying heavy heartaches in their life that are almost indescribable through ordinary means.