Its why they add blue to white paper/washing powders etc... optical whiteners are.... blue !!

- sigh ... here I just like the pic and you get all technical on me !
- sigh #2 ............. Thank You for being you ~~~~~~~~~~~~~~~~~~~~~~~~
- sigh #3 ...................Closer .............................................
- sigh #4 ---------------- In Spirit -------------------------------------------

Isn't the air clean after the snow...and rain down here. Neat color.

.. I have absolutely no idea ! All I remember about after rains in FL, steam/vapors rising from the hot pavement !

Lovely Carolina blue!

.. yes, a blue sky in North Carolina is a sight to behold { and I used to think only Florida had them }