thank you! happy to tweak it.
below are the options in black&white which work aswell.

http://www.mrthd.de/bis2_bw.png
http://www.mrthd.de/bis1_bw.png

http://www.mrthd.de/bis2.png
http://www.mrthd.de/bis1.png

minimalist design subtly referencing the b, python & the shimmer of the element bismuth (optical illusion/looking at the inside or outside). instantly recognizable & working at all scales. i was shooting for understatement & room for interpretation.