Freelancer:
fotonrunner
Harfia and the four elements
Hi, your idea about the four elements related to colours ispired me, so here is my concept. Because you want simple logo, i constructed the four elements as simple geometry forms keeping the most characteristic attributes of each. From another viewpoint, is also symbolises machinery parts like an excavator's arm and bucket, a road roller's "wheel" and so on. There are some variations with the layout of the characters and the saturation os colours, and if you don't like the small yellowish caps on the H and A, there are versions without too.