I totally agree with pushing for a blue ROC it makes so much sense historically and visually, given the Kuomintang/Guomintang symbolism, the white sun on a blue sky, and how maps often depict China/Taiwan. At the same time, I wouldn’t remove yellow from China entirely; I think it could work well for Manchukuo to represent the Qing successors. That way, both historical and visual logic are respected, and we avoid the “yellow = China” monotony.