Pink, or even bloody colostrum is not necessarily a bad thing - may merely reflect some bleeding as a result of udder edema and/or minor injury to the udder as a result of engorgement prior to calving.
Better keep a close eye on this calf for navel ill/joint ill or other infections.
Unless he managed to nurse before you got in the middle of this, it sounds as if you deprived him of access to most of the colostral antibodies he needed.
In your initial post, you indicate that you gave milk replacer - which would have effectively 'shut down' the intestine's ability to absorb colostral antibodies. If, however, you misstated that, and you gave a good quality colostrum replacer(not the cheap colostrum supplements), you may be OK.
Colostrum replacers and frozen colostrum are better than nothing, but the best thing is colostrum from the dam - has antibodies against most of the pathogens present on the farm, AND the maternal white blood cells in the colostrum also contribute to immunity, as well.
I agree with FSR - if the calf can and will nurse, I leave them alone; we only intervene if its a big, dumb calf that is slow getting started, or if the cow has big teats that the calf can't get onto.
I'll help the calf with that cow that has balloon teats, but she's leaving after we wean that calf - I don't have time to be milking a cow with a bad udder just so that her calf doesn't starve.