Abu Rimtha Taymi (may Allah be pleased with him) says:
"I went with my son to Messenger of Allah ﷺ. (Probably he had not see Messenger of Allah ﷺ before). When I saw him I said to myself immediately, 'This is the true Messenger of Allah'. At that time Messenger of Allah ﷺ was wearing two pieces of green clothing. (His lungi-sarong, waist-wrap and shawl were both green). On a few hairs there were signs of old age, but those hair were red".

حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ: حَدَّثَنَا شُعَيْبُ بْنُ صَفْوَانَ، عَنْ عَبْدِ الْمَلِكِ بْنِ عُمَيْرٍ، عَنِ إِيَادِ بْنِ لَقِيطٍ الْعِجْلِيِّ، عَنْ أَبِي رِمْثَةَ التَّيْمِيِّ، تَيْمِ الرَّبَابِ، قَالَ: أَتَيْتُ النَّبِيَّ ﷺ، وَمَعِي ابْنٌ لِي، قَالَ: فَأَرَيْتُهُ، فَقُلْتُ لَمَّا رَأَيْتُهُ: هَذَا نَبِيُّ اللهِ ﷺ وَعَلَيْهِ ثَوْبَانِ أَخْضَرَانِ، وَلَهُ شَعَرٌ قَدْ عَلاهُ الشَّيْبُ، وَشَيْبُهُ أَحْمَرُ.