At the installation yesterday, several folks asked: why green? Why not red? Dixie also asked in the comments under the previous post. I figured it was worth putting at the top of the blog.
Lutheran Service Book Agenda, on page 174, notes under The Rite in Detail, #4:
"When the propers for ordinations and installations are used, the color is red. When the propers of the Sunday or festival are used, the color is that of the day or season."
Hence, when we celebrated Vespers of Pentecost 21 yesterday, and used the propers for that celebration, we also used the color for that celebration.
One might also note that long-standing practice notwithstanding, there is simply NO provision for laying on of hands at an installation; that is reserved for ordination. I refuse to lay hand on the head of man being installed in office; I think it sends a confused message.