Very white with a hint of yellow, very much like sunlight,
I have one in my EL Blaster 1-R which drives the led at about 1 watt, I find that the TX1J is quite efficient
Surprisingly white. I went to hunt the Great White Wall with a TX1J driven at 500mA and a TW0L driven at 750mA, and the X1 bin is really unusually white. I can't quite describe the tint, at most I'd call it a slightly different shade of white.
I would like to say it is sunlight color, very good for use in dark. The yellowtint color is good for detail seeing of grass and bush or any thing in dark.