It is still Easter Season in the Catholic Church
The word "Easter" comes from Old English, meaning simply the "East." The sun which rises in the East, bringing light, warmth and hope, is a symbol for the Christian of the rising Christ, who is the true Light of the world. is a central symbol of this divine light, which is Christ.It is kept near the ambo throughout Easter Time, and lit for all liturgical celebrations.
-from the United States Conference of Catholic Bishops
From Universal Norms on the Liturgical Year
and the Calendar:
22. The fifty days from the Sunday of the Resurrection to Pentecost Sunday are celebrated in joy and exultation as one feast day, indeed as one "great Sunday." These are the days above all others in which the is sung.
23. The Sundays of this time of year are considered to be Sundays of Easter and are called, after Easter Sunday itself, the Second, Third, Fourth, Fifth, Sixth, and Seventh Sundays of Easter. This sacred period of fifty days concludes with Pentecost Sunday.
24. The first eight days of Easter Time constitute the Octave of Easter and are celebrated as Solemnities of the Lord.
25. On the fortieth day after Easter the Ascension of the Lord is celebrated, except where, not being observed as a Holyday of Obligation, it has been assigned to the Seventh Sunday of Easter (cf. no. 7).
The liturgical color for Easter is white.The General Instruction of the Roman Missal(no. 346) also states: On more solemn days, festive, that is, more precious, sacred vestments may be used even if not of the color of the day. The colors gold or silver may be worn on more solemn occasions in the Dioceses of the United States of America."