The chroma and its major controlling factors of the Chafangcun loess-paleosol profile was studied in Dan- feng, which is located on the southeast Shaanxi. Results show that lightness, redness and redness/yellowness are significantly different between loess and paleosol layers,with relatively low lightness values and high redness and redness/yellowness values in the paleosol layers. The lightness is strongly linked to the organic matter, By contrast the redness and redness/yellowness are strongly linked to the types (e.g.,hematite and goethite)and concentrations of iron oxides. While variations in the lightness, redness and redness/yellowness are controlled by different color materials, these three proxies are closely associated with post-depositional processes such as chemical weathering and pedogenesis. And they are also good comparison between these chromaticity coefficients and magnetic susceptibility. Which indicates that the variation of chromaticity coefficients can indirectly reflect the change of climate and pedogenic environment.