cas77Dupont CAS77 #ca4c48 Hex Color Code. The hexadecimal color code #ca4c48 is a shade of red. In the RGB color model #ca4c48 is composed of 79.22% red, 29.8% green and 28.24%This paper describes the content, organization, specifications, and methods of use of the CAS77 and CAS7276 on files of worldwide chemical literature, databases produced