Placing down a beacon in the path of a colored beacon beam causes it to lighten, in a manner identical as if you were to place white stained glass instead.
MC-196888
Beacons act like White Stained Glass
Resolved
Works As Intended
0
(Unassigned)
Community Consensus
Block states, Rendering
1.16.1, 1.16.2 Pre-release 1
Retrieved
Can confirm.