Although the "Ollie the Owl" on the background of TripGreen is a second-class LOGO, it is still worth mentioning because it combines black and green colors well. The black LOGO is exquisite, elegant and charming. They often talk about luxury, professionalism and exquisiteness. Green is about nature, freshness and purity, which is an excellent choice for brands that want to be associated with nature. It is also a soft color, which is usually associated with growth and health.