It is narrated from Ya'la bin Umayyah (may Allah be pleased with them) that a Bedouin came to the Prophet ﷺ and he was wearing a shirt or a cloak, and there were traces of yellow color on it. He said: "I have entered into Ihram and I am wearing this (cloak or shirt)." The Prophet ﷺ said: "Take off your shirt or your cloak and remove this yellow color from yourself, and do in your 'Umrah as you do in your Hajj."
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 850
Hadith Takhrijاخرجه البخاری، الحج، باب غسل الخلوق ثلاث مرات من الثياب (1536) ومسلم، الحج، باب ما يباح للمحرم بحج أو عمرة البسة.. الخ (1180)۔