bridge at the Japanese garden
Edited with color harmony in mind, rather than my usual LAB colour space broadening of whatever hues are already there.
There is a weekly challenge at The Photo Forum. This week's challenge is "to look for or create color harmonies for your photos."
Some interesting links to web sites about colour harmony were provided. I've been reading about complementary and analogous colours.
Here I made the "base" color a greenish yellow. In Lightroom I used the Hue and Saturation sliders to shift greens toward yellow and shift orange away from yellow toward red. Reds were shifted leftward which made the brown bushes more purple.
Saturation of yellow, orange and blue were slightly increased.
Then in Photoshop, in LAB mode curves of the A and B channels were used to increase colour contrast. The reddish purples which are complementary to the base colour and yellows were accentuated. Blue, the complement of the base was accentuated.
In my now aged and creaky Ps CS4 version of Photoshop, there is something in the Extensions menu called Kuler which in newer versions of Ps is called Adobe Color Themes. These can be used to identify analogous and complementary colours on the color wheel from a designated base. I used that to help identify what I should be accentuating or de-emphasizing.