change color scheme for trace messages?

Hi
On my vanilla gnome terminal, Logger Trace messages are invisible, unsurprisingly perhaps because the defined color for LogTrace is black... (30). I fix the problem for myself easily by keeping a local custom copy of your package.
However, I believe that my usage is not untypical, and I wonder if you would like to consider a PR.
I have changed info, debug and trace to 36,35 and 34 (cyan, magenta, blue).
I suspect these would work well on both white and black backgrounds, though I only care about black.

Otherwise thanks for making the logging framework so accessible!

kr, nic