In the Orthodox and Eastern Catholic Churches, Easter eggs are dyed red to represent the blood of Christ, with further symbolism being found in the hard shell of the egg symbolizing the sealed Tomb of Christ-the cracking of which symbolized his resurrection from the dead.
-en.m.wikipedia.org -

The color is not only a symbol of the blood of Christ but also has a special meaning for Russia, as many prominent sites and cultural artifacts are related to the word "krasni," which means both the color and the word "beautiful." 22.10.2020
-www.travelallrussia.com-