Hi there - check picture below, shot in RAW with fixed WB 5000k. The background blind is off-white - you could look at this to see the different tints of the various LED’s. The hat is USC red - very difficult to reproduce accurately (this is the CRI “R9” spec).
My vote is CCT 4500k (4000k too warm/yellow and 5000k too cold/blue, YMMV) and LED is 219b 4500k. Long considered among the very best both subjectively (among other things, makes colors pop) and objectively (among highest Ra and R9 of all LED’s). 219b nails the hat’s red color here. You could check comparison pictures, MHO’s, and specs of many Nichia LED’s in that same thread I listed below.
Among other LED’s you listed, 519a is next best choice. Note it has a yellow/golden tone; lovely and soothing and among my most favorite, but that yellow tone is hard to overlook once you know it’s there. My 519a 4500k measures 4000k and looks too yellow for my taste but subjective opinion means YMMV. More 219b and 519a comparison here (see how palm tree and hot pink flowers “pop” with 219b): Convoy S21D w/ legendary Nichia 219b :) - Review & comparison w/ Nichia 519a, E21a & other LEDs & lights (D4V2, Convoy S21F). - #4 by cannga .
