Colored noise is a kind of widely distributed,diverse spectrum and frequency energy unevenly distributed random signal. Depending on the power spectral density,colored noise can be divided into different “colors”,the different “color” of the noise in each of the different areas play an important role. To obtain different “colors” of colored noise,this paper proposes a noise variable color colored noise,the method based on autoregressive moving average model of colored noise,using the method of m sequence,mapping method,and ARMA model filtering method,producing adjustable power spectrum of various (gaussian) colored noise,and implementing on the FPGA. Tests show that the generator can not only continuously produce subtle color difference of all kinds of colored noise (including white noise),but all the noise performance is good.