It will probably make them take a few extra moments to verify it's really you but the Department of State in the United States has no rules or notices that you need to look identical to your photo.
Here is a Q/A about facial hair and hair coloring on the DoS travel website I found: http://travel.state.gov/passport/pptphotoreq/photofaq/photofaq_5291.htmlhttps://travel.state.gov/content/travel/en/passports/requirements/photos.html
Q: Do I need to take a new photo if I recently dyed my hair a new color or grew a beard? *Q: Do I need a new photo if my appearance has changed (grown a beard, dyed my hair)?
A: New photos are only requiredOnly if your appearance has significantly changed changed from what is in your photocurrent passport. GrowingGrowing a beard or coloring your hair hair would not constitute a significant change. IfIf you can still be identified identified from the photo in your current passport or visa application, you do not need to apply for a new passport or submit a new photo for your visa application. However, you
You may have to apply for for a new passport or submit a new photo for your visa application if you you have:
- Undergone significant facial surgery or trauma
- Added or removed numerous/large facial piercings or tattoos
- Undergone a significant amount of weight loss or gain
- Made a gender transitionMade a gender transition
The acceptanceIf the appearance of your photo is atchild under the discretionage of 16 has changed due to the U.S. passport agency wherenormal aging process, you do not need to apply for a new passport or U.S. embassy or consulate where you apply for a visahim or her.