If you are looking for a website where you can change the colour of image so I want to tell that you are on the right place. Now without wasting of time go through the instructions.
Go to google.com
Now write https://manytools.org/image/colorize-filter/ into the search bar of google and then enter
Step3- you will be on the website
Step 4- now scroll down click on the select and then select the image which you want to change the colour.
Step5- you can see the colour of the image which was black but now is is in blue colour
Step 6- you can change the colour of image according to your requirement just click on the blue box which is showing into image
Step7- you are seeing that the image colour is green now