The space-selective formation of a series of color center defects in bulk transparent potassium chloride (KCl) crystal induced by 1 kHz and 200 kHz, 800 nm near-IR femtosecond laser which is focused via low-aperture objectives are reported, respectively. Absorption spectra before and after femtosecond laser irradiation indicate that five kinds of color centers are induced. With the increment of laser power, the concentration of color centers also increases. From the absorption spectra, it is found that the corresponding peak values of absorption bands of color centers induced by two different repetition rates femtosecond laser have slight shift. It is speculated that this phenomenon is resulted from the heat accumulation of the high repetition rate femtosecond laser. Theoretical analysis confirms that the point defects in bulk transparent KCl crystal and multiphoton absorption induced by high power density femtosecond laser-KCl crystal interaction are the main reasons of the formation of color centers.