Although many store-bought dyes may be easier to use, the tradition of using natural dyes is still very common today. According to the Estonian Folk Calendar, the colours had meaning: pink- gentle, green- hope, blue- fidelity, yellow- falsehood, and grey- balance. Girls would let the boys choose an Easter egg and depending on which they chose, the girls would then be able to judge their personalities.
Easter customs and springtime traditions varied throughout different regions of Estonia. Every year, the Estonian Open Air Museum in Tallinn celebrates some of these old Easter traditions. You can also visit Setomaa in Southern Estonia to learn more about their customs as well.
Source: Eesti Rahvakalender II, compiled by Mall Hiiemäe, Tallinn: Kirjastus "Eesti Raamat", 1981.