Above is a picture taken from little tree, which leafs are turned from green to red. The spectrum measured from a red leaf can be seen below.

Color coordinates calculated from the spectrum
Spectrum Red
x 0.4973
y 0.3235
z 0.1792
X 13.1679
Y 8.5674
Z 4.7451
R 21.2354
G 5.8565
B 4.7339
L* 35.1377
a* 38.3957
b* 17.7494
u' 0.3378
v' 0.4945
u* 64.0155
v* 11.9019

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