Silk Garments
Hadith – Sahih Al-Bukhari 7.693, Narrated Uqba bin Amir: A silken Farruj was presented to Allah's Apostle and he put it on and offered the prayer in it. When he finished the prayer, he took it off violently as if he disliked it and said, "This (garment) does not befit those who fear Allah!"

Saffron (Yellow, Red/Yellow) Colored Garments
Hadith – Sunan of Abu Dawood #4037, Narrated Imran ibn Husayn – The Prophet (peace be upon him) said: I do not ride on purple, or wear a garment dyed with saffron*, or wear shirt hemmed with silk.

Hadith – Sunan of Abu Dawood #4210, Narrated Abdullah ibn Mas'ud – The Prophet of Allah (peace be upon him) disliked ten things: 1. Yellow colouring…

Hadith – Sunan of Abu Dawood #4055, Narrated Abdullah ibn Amr ibn al-'As – We came down with the Apostle of Allah (peace be upon him) from a turning of a valley. He turned his attention to me and I was wearing a garment dyed with a reddish yellow dye. He asked: What is this garment over you? I recognised what he disliked. I then came to my family who were burning their oven. I threw it (the garment) in it and came to him the next day. He asked: Abdullah, what have you done with the garment? I informed him about it. He said: Why did you not give it to one of your family to wear, for there is no harm in it for women.

Patterns/Marks In the Clothing: Simple Clothing Preferred
Hadith – Sunan of Abu Dawood, #4041, Narrated Aisha, Ummul Mu'minin, RA – The Apostle of Allah (peace be upon him) once prayed wearing a garment having marks. He looked at its marks. When he saluted, he said: Take this garment of mine to AbuJahm, for it turned my attention just now in my prayer, and bring a simple garment without marks.

Hadith – Muwatta 3.72 – Looking in the Prayer at What Distracts You From It