How to change the color of a QR code?

[#1]

Hi guys,

I have a blue QR code. I'm trying to make the blue in this image pitch black. The white background obviously needs to stay white. I tried converting it to grayscale and then adjusting the color balance but this colores my white background as well. 

This is probably really easy but I'm a newbie and can't figure it out. Any ideas?

Kind regards,

Kimberly

[#2]

Hi guys,

I have a blue QR code. I'm trying to make the blue in this image pitch black. The white background obviously needs to stay white. I tried converting it to grayscale and then adjusting the color balance but this colores my white background as well. 

This is probably really easy but I'm a newbie and can't figure it out. Any ideas?

Kind regards,

Kimberly

[#3]

Update: 

The image is quite low quality which is why I can't simply convert it to monochrome. Because the boundries of the colores are blurry and Illustrator doesn't know where each color begins and ends. I exported my own QR code from https://www.qrcode-monkey.com and exported it in SVG. This solves my issue. If any of you know how to do this in Illustrator, please let me know. 

[#4]

Count the squares and then let Object > Make Object mosaic vectorize it. Works well with QR codes.

[#5 · Accepted solution]

You can make QR codes in InDesign, Object> Generate QR code, export to PDF, place the PDF into your Illustrator file. You can make it any color you like.

[#6]

That barely took me 5 seconds. Thanks!