So ... your husband was arrested for and charged in Colorado with using a false identity. He is on probation in Colorado. And he failed to appear in court in Colorado.
Was this a deferred adjudication? A conviction?
How did he use the false identity (what led to the charge)?
The reason I ask is that using a false identity can be a misdemeanor or a felony. Your husband is not at all likely to be extradited on a misdemeanor where the penalty on the original charge is a fine up to $750 and jail up to six months (with probation more common than jail). But use of a false identity to commit id theft can be a fine up to $500,000 and jail time of two to six years. Extradition would be likely.
Whatever the case, because your husband is in jail for violating his probation and he might remain there for awhile while Colorado decides what to do with him, your husband should be speaking with an attorney. Even if he is not extradited, the warrant needs to be taken care of so he doesn't get arrested and jailed again.
Good luck.