Riding a gold and blue bike costs 1.5 yuan (20 cents) for half an hour. [Photo/VCG]

Many bike users and netizens said that the color is too dazzling, especially in sunlight, and may threaten traffic safety.

A first for the industry, the bikes provide solar-powered chargers for mobile phones on the handlebars.

"It also gives people a place to put their phones while riding if they need to use the phones for navigation, for example," the company said.

Some netizens joked that new entrepreneurs joining the fierce bike market will run out of colors.

China's bike-sharing sector has experienced rapid expansion since early last year, with roughly 10 million such bikes scattered across the country's cities. The major players include Mobike, represented by orange bikes, and Ofo, which has yellow bikes.

Shi Xiaofeng contributed to this story.