Color-stabilized electrochromic devices

An electrochromic medium having a predetermined color while in a high transmission state, comprising:

• (a) an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic;
• (b) a redox buffer;
• and
• (c) means associated with the redox buffer for controllably maintaining the predetermined color of the electrochromic medium while in the high transmission state relative to an electrochromic medium without the redox buffer.

An electrochromic device, comprising:

• (a) at least one substantially transparent substrate having an electrically conductive material associated therewith;
• and
• (b) an electrochromic medium having a predetermined color while in a high transmission state, wherein the electrochromic medium comprises:
• (1) an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic;
• and
• (2) a redox buffer, wherein the redox buffer controllably maintains the predetermined color of the electrochromic medium while in the high transmission state relative to an electrochromic medium without the redox buffer.

An electrochromic process comprising the steps of:

• (a) providing an electrochromic medium which includes an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic, and a redox buffer;
• (b) cycling the electrochromic medium between a high transmission state and a low transmission state;
• and
• (c) controllably maintaining a predetermined color of the electrochromic medium during said high transmission state relative to an electrochromic medium without the redox buffer.