We had brilliant blue skies this morning, but for some reason it was really hard to capture any of the colour - I tried metering off almost everything, polariser on (hence the vignette), polariser turned around more, polariser off... Here's the best I could eventually come up with, with saturation tweaked a little.
Technicolor April: http://365project.org/discuss/themes-competitions/17191/technicolor-april
I keep running a line of a song in my head "there's a star on the far horizon, shining bright in an azure sky" but I'll have to change that to plane now. Very nice- I think you did fine with the color. Good shot!