"The Messenger of Allah forbade the Muhrim to wear clothes dyed with saffron or Wars."  

نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يَلْبَسَ الْمُحْرِمُ ثَوْبًا مَصْبُوغًا بِزَعْفَرَانٍ أَوْ بِوَرْسٍ  

"The Messenger of Allah was asked what clothes the Muhrim may wear. He said: 'He should not wear a shirt, or a burnous, or pants, or an 'Imamah (turban, or any garment that has been touched by (dyed with) Wars or saffron, or Khuffs except for one who cannot find sandals. If he cannot find sandals, then let him cut them until they come lower than the ankles, (sahih)  

سُئِلَ رَسُولُ اللَّهِ ﷺ مَا يَلْبَسُ الْمُحْرِمُ مِنَ الثِّيَابِ قَالَ لاَ يَلْبَسُ الْقَمِيصَ وَلاَ الْبُرْنُسَ وَلاَ السَّرَاوِيلَ وَلاَ الْعِمَامَةَ وَلاَ ثَوْبًا مَسَّهُ وَرْسٌ وَلاَ زَعْفَرَانٌ وَلاَ خُفَّيْنِ إِلاَّ لِمَنْ لاَ يَجِدُ نَعْلَيْنِ فَإِنْ لَمْ يَجِدْ نَعْلَيْنِ فَلْيَقْطَعْهُمَا حَتَّى يَكُونَا أَسْفَلَ مِنَ الْكَعْبَيْنِ