Index: code/cgame/cg_weapons.c
===================================================================
--- code/cgame/cg_weapons.c	(revision 2061)
+++ code/cgame/cg_weapons.c	(working copy)
@@ -1963,6 +1963,10 @@
 		if ( weapon == WP_RAILGUN ) {
 			// colorize with client color
 			VectorCopy( cgs.clientinfo[clientNum].color1, le->color );
+			le->refEntity.shaderRGBA[0] = le->color[0] * 0xff;
+			le->refEntity.shaderRGBA[1] = le->color[1] * 0xff;
+			le->refEntity.shaderRGBA[2] = le->color[2] * 0xff;
+			le->refEntity.shaderRGBA[3] = 0xff;
 		}
 	}