"Daichidoron" (Commentary on the Great Wisdom Sutra) argues that 'at rinju, those whose color changes to black will go to Hell,' and "Makashikan" (Mahayana Practice of Cessation and Contemplation) by Zhiyi of the Tendai sect in China also discusses that 'a change of one's color to black is compared to the shadow of Hell.'
また『大智度論』には「臨終の時、色黒き者は地獄に堕つ」とあり、中国天台宗の智顗の『摩訶止観』にも「黒色は地獄の陰に譬う」とある。