You cannot deduct the income earned in Texas. You must report all of your wages to your state of residence. You will then be taxed on them. If you paid taxes to another state, you can take a credit for those out-of-state taxes to reduce your Colorado liability. Since Texas doesn't have an income tax, any money you made working there wouldn't generate a credit to offset your Colorado tax liability.
You can read more about living and working in different states here: Multiple States—Figuring What's Owed When You Live and Work in More Than One State
