Hello,

In the following question my opinion is #2 would be the correct answer, is this correct?

Thank You

The range of dark and light blue in the sky refers to the what of this color?

#1 Value
#2 Color Temperature

Explanation of color value:

http://char.txa.cornell.edu/language/element/color/color.htm

Explanation of color temperature:
http://www.sizes.com/units/color_temperature.htm