Final answer:
The provided information does not supply a clear answer to who proposed the old gold and black as club colors. Details regarding early baseball history and the design of a new flag are mentioned, but they are not relevant to the specific question asked.
Step-by-step explanation:
The question about who proposed old gold and black as club colors does not clearly correlate with the provided reference information about early baseball history and the designing of a new flag. There is a mention of the Cincinnati Red Stockings becoming the first salaried baseball team in 1869 and a detail about Moses Fleetwood Walker, the true first African American to play in Major League Baseball in 1884, predating Jackie Robinson. However, these details do not answer the question regarding the club colors.
Similarly, the reference to the new flag, proposed by Rocky Vaughan and collaborators Sue Anna Joe, Kara Giles, and Dominique Pugh, approved and ratified in January 2021 featuring colors of blue, gold, and red is not directly related to the old gold and black club colors question. Therefore, it is not possible to provide an accurate and informative answer from the information given.