A trademark can be any sign or symbol that is capable of being represented graphically, used to distinguish goods and services from other businesses.
Trademarks can include a colour or a combination of colours, shapes, slogans, letters, numbers, symbols, or words and even phrases.
Your trademark must however be distinctive and non-descriptive to pass the registration process. You can use words and phrases that have no meaning in the specific industry sector. For instance “Kiwi Designs” would most likely pass the test for a web design service.