the blood red eggs are found in orthodoxy and come from the legend/tradition of mary magdalen speaking to emperior tiberius on Jesus's resurrection. She used an egg to illustrate it (think the now-called christmas tree that was used to illustrate the trinity) “Christ rose from the dead as surely as that egg in your hand will turn red!” And so they did. Any by the way, Orthodox don't refer to it as 'easter'. They still use the word Pascha, from the hebrew word Passover.