Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:20:102

The Day the Horn will be blown. And We will gather the criminals, that Day, blue-eyed.  

The day the Trumpet is blown, the Horn, the Second Blast, and We shall assemble the criminals, the disbelievers, on that day bruised, in the eye along with their faces blackened.
القرآن:٢٠:١٠٢

يَوْمَ يُنْفَخُ فِي الصُّورِ ۚ وَنَحْشُرُ الْمُجْرِمِينَ يَوْمَئِذٍ زُرْقًا  

{يوم ننفخ في الصور} القرن، النفخة الثانية {ونحشر المجرمين} الكافرين {يومئذ زرقا} عيونهم مع سواد وجوههم.