I did a quick search for material supporting that LED current would directly affect color, but didn't find anything. However, I did find that junction temperature has a significant effect on color:

The short version:
http://www.lrc.rpi.edu/programs/NLPI...s/LED/heat.asp

A much longer analysis:
http://www.digikey.com/en/articles/t...er-pwm-dimming

Alas, the data sheet only shows (figure 3) that the LED gets less bright when hotter, but doesn't mention any effect on color.

In any case, the L130 specification is based on a steady state with the junction temperature held at 25 C. Measurements that do not control the junction temperature should therefore read a little higher, but given the low torch current of only 50 mA [1], I wouldn't expect a significant deviation. Thus, the measurement results should be more than sufficient for the purpose of component selection.

- Werner

[1] https://wiki.maemo.org/N900_Hardware_Flash_Torch