Hello, again...
I have also just heard that the new SDs use the stock OTS BNSF yellow for the Susie-Q (SD40T-2s and SD60s, and upcoming work in the Geeps). This is because they were painted off-line and this was used because the painted purchases it in bulk.
Makes sense...
The SD70s, I believe, were the last gen "safety" yellow, similar to the CNW's hi-vis yellow.