There are spiders that can change colors in relatively short periods of time - such as some of the crab spiders referred to as flower spiders. The color shifts are not food related though. There are also cases of spiders appearing to be differently colored due to the foods they've eaten - such as Loxosceles fed on pink bolworms turning a nice reddish color, or turning greenish due to being fed a green food source (don't remember right now what the green food was). But these were the result of pigments from the food source showing through the cuticle of the exoskeleton.
As to the idea of honey bees inducing color changes in tarantulas - I'm very doubtful, but willing to consider it. The exoskeleton of a tarantula is thick enough that I would not expect to see color changes through it, and there's no real mechanism for altering the colors of the exoskeleton itself.
As to the idea of honey bees inducing color changes in tarantulas - I'm very doubtful, but willing to consider it. The exoskeleton of a tarantula is thick enough that I would not expect to see color changes through it, and there's no real mechanism for altering the colors of the exoskeleton itself.