DENVER (AP) — Minimum wage workers in Colorado are getting a small raise in 2015.

As of Thursday, Colorado's minimum wage is $8.23 an hour, up 23 cents from last year. Restaurant servers and other tipped workers must be paid a minimum of $5.21 an hour in the new year.

Colorado is one of over a dozen states increasing their minimum wages. The hike comes as Boulder explores raising its minimum wage above the state's and as fast-food workers campaign nationally to gain $15 an hour pay.

The minimum wage here is now over $3 more than it was in 2006, when Colorado voters backed raising it and trying future increases to inflation.

The federal minimum wage has remained unchanged at $7.25 since 2009.

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