The Color of Light

As an addendum of sorts to my question in the post below on the color of light... is it constant? is it cool/blue? is it warm/yellow? does it vary from morning to afternoon? Is it dependent on the subject being lit?... I looked out my window and saw this white blanket I had out drying in the sun. I thought I'd isolate the colors in Photoshop to see where they fell on the spectrum.



The far right is pure white. The lightest light from my blanket is the second on the right. So its falling in a blue/gray or blue lavender I'd say. Now we can argue that the camera messed up or something like that.
But I'd say the brightest light on the blanket is fairly cool even with the direct, extremely hot Texas sun still shining on it.
(Its still summer here and I'm tired of it, can you tell?)