I want to know the answer to the following question:
Who suggested the use of brightly coloured scagliola and blue and pink lapis?
All the background I'm provided with is that "The original early 19th-century interior designs, many of which survive, include widespread use of brightly coloured scagliola and blue and pink lapis, on the advice of Sir Charles Long.". Is that enough to answer the question?
Answer: yes