Modded reactors using "use_fuel_glow_color = true" will not show the custom glow color during shutdown, but rather the default one, as shown below (glows purple-ish, then flashes green). If I change the default glow color, the "flash" during shutdown changes to whatever I changed the default to.
[0.18.34] use_fuel_glow_color ignored during reactor shutdown
Re: [0.18.34] use_fuel_glow_color ignored during reactor shutdown
I see where it is coming from: fuel glow is only applied when reactor has a fuel burning to take its color. When there is no fuel, there is no variable that holds glow color of recently used fuel and so default fuel glow color is taken.