What was DR Barnardo's favourite colour?

As an educator with expertise in various subjects, I must clarify that Dr. Barnardo was a philanthropist and founder of the charity Barnardo's, known for his work with vulnerable children in the 19th century. There is no specific information available about his favorite color as it was not a significant aspect of his historical legacy. It is important to focus on his contributions to society rather than personal preferences that are not well-documented.