Wa `alaykum As-Salamu waRahmatullahi wa Barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
Dear questioner, we would like to thank you for the great confidence you place in us, and we implore Allah Almighty to help us serve His cause and render our work for His Sake.
In his response to your question, Sheikh Ahmad Kutty, a Senior Lecturer and an Islamic Scholar at the Islamic Institute of Toronto, Ontario, Canada, states:
The Prophet (peace be upon him) ordered us to learn the rites of Hajj from him. We know that he and his companions wore white garments while performing Hajj and `Umrah.
Furthermore, the Prophet (peace be upon him) also encouraged us to wear white clothes and shroud our dead ones in them.
Allah Almighty knows best.