Do Microbladed brows change color over time?

Generally, all permanent cosmetics change colors over time. Reasoning? Every color has a combination of colors in them, as you have learned in elementary art class.

As time goes by, there are several factors that can cause the colors to fade including exposure to the sun. Only SOME of the colors in that color will fade faster than others, leaving the longer lasting colors behind.

Depending on the brand of pigment used in permanent cosmetics, your color could fade to cool or warm tones.

Maintenance is a part of permanent cosmetics like any other beauty regimen.  During the maintenance visit, the colors that have faded are put back in the skin to re-balance the colors. As long as you maintain your permanent makeup in a timely manner, fading to those unwanted colors should not be a problem.  Yearly visits are recommended.