Jami` at-Tirmidhi Book 43, Hadith 83
"The Messenger of Allah (ﷺ) said: 'Wear white, for indeed it is very pure and cleaner, and shroud your dead in it.'"
"The Messenger of Allah (ﷺ) ordered us with seven things and he forbade us from seven. He ordered us to follow the funeral, visit the ill, reply to the sneezing person, accept the invitation, assist the oppressed, to help the one who made an oath, and to return the Salam. And he forbade us from seven things: From the gold ring, or ringlets of gold, silver vessels, wearing silk, Ad-Dibaj, Al-Istabraq, And Al-Qassi."
"I saw the Prophet (ﷺ) on a clear night, so I looked at the Messenger of Allah (ﷺ) and at the moon, and he was wearing a red Hullah, and he looked better than the moon to me."