Two triphenylamine (TPA) derivatives, N,N,N',N'-tetrakis(4-methoxyphenyl)-1,4-phenylenediamine (TPPA) and N,N,N',N'-tetrakis(4-methoxyphenyl)-1,1'-biphenyl-4,4'-diamine (TPB), were successfully synthesized in order to play a role in palette. Also, they are further introduced into the electrochromic devices (ECDs) combining with a well-known cathodic material, heptyl viologen (HV), so as to endow the resulted ECD with the ability as panchromatic shutter for the transparent display technology. HV has both the capability to improve the performance and complementary absorption of the resulted devices making the device closer to a truly black color. Black devices could be successfully fabricated by using different concentration of TPPA/TPB/HV. The effect of the electrolyte on the EC behaviors was also discussed for the purpose of improving the solubility of the EC materials. The obtained ECDs exhibited exceptional novel EC properties, including high contrast ratio between coloring and bleaching states, short switching time, and enhanced long-term stability. Furthermore, such devices showed high transmittance in almost the whole visible light region that own a high contrast in L value (L*: 86) and transmittance (T%: 75%). Most importantly, the L*a*b* values for all the devices demonstrated nearly the same compared to the blank device (L*: 92.61; a*: -5.58; b*: 5.43). That is, the neutral states of ECDs are nearly transparent despite of introducing such EC materials, which facilitate the applications as EC display. Furthermore, it is paramount and worth noting that this ambipolar system reveals excellent panchromatic EC performance even without adding supporting electrolyte into the device.