Crimson is a color.
Crimson may also refer to:
- SGI Crimson, a Silicon Graphics computer workstation
- The Harvard Crimson, the daily student newspaper of Harvard University
- The Florida Tech Crimson, the official student newspaper of Florida Institute of Technology
- Crimson, the code name for Canada in the U.S.'s War Plan Red
- The Crimson Permanent Assurance, a short film that appears before the 1983 Monty Python movie The Meaning of Life
- Crimson, a Java XML parser, which is part of Apache XML Project
- Crimson Editor, a freeware text editor
- Crimson King, a character in Stephen King novels
- Crimson, a codename for the API's used to gather event logs in Windows Vista and Longhorn
In comics:
In music:
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