It is well known that Saturdays and Sundays are not technically days of the Great Fast though fasting is observed save for the relaxation in respect of wine and oil. I have two questions regarding the celebration of the Divine Liturgy of St Basil the Great on Sundays in Great Lent.
First, it appears from looking at YouTube clips that the colour of vestments used varies from Lenten purple to gold, to gold, to white (Greek style with crosses) and even in the same church a mixture of purple and gold. Is there a baseline as to what is the proper colour of vestments for Great Lent Sundays, or is there no clear universal practice?
Secondly, with regard to singing, where Russian melodies are used, are the Lenten melodies for weekdays set aside for Sundays of Great Lent, and the usual melodies used?