We sell energy saving products and solutions. We are energy efficiency experts. Our premise is "energy efficiency made easy"
'Negergy' is 'negative energy' as in 'saved energy'
Organization name in a stylised type/font becomes the logo.
An image or shape that is easily recognizable is used to represent your business.
Representing trends from the internet including gradients, rounded corner etc.
No preference, But: Reds and/or Blues do come to mind. Greens might be too obvious for a "green" company.