make icon

[CharliesGal]

I would like to know how to make a simple image to put on my watchface. I would like it to be the greyscale 8 bit png that fitbit says in its documentation. 

I tried using ImageMagick - but that is too complicated for me. 

I tried make a simple image in MSPaint as a greyscale - but that also doesn't work to show the color when I use the fill to change the color. 

Any suggestions?

I did download the fitbit standard icons from github, but I want one with a simple up arrow and another with a simple down arrow. 

This seems like it should be simple, but I can't seem to get the image to work. 

Thanks. 

[JonFitbit]

You can use Photoshop, or Paintsho Pro, but both of those are paid apps. You may be able to get trial versions?

Or perhaps you could try paint.net, it's free.

https://www.getpaint.net/

I'm not sure of the exact method for each app, but probably just changing the image mode to grayscale.

[JonFitbit · Accepted solution]

Actually, this website can do it too. https://image.online-convert.com/convert-to-png

Just check the "gray" box.

[CharliesGal]

Ooh Rah! That worked. Nice and simple to use!

Thank you

[ashish2chaudhar]

I've modified heart rate icon using paint and then converted it to grayscale using the website you mentioned but still, I am not able to change color using fill attribute please help me. Here is the icon

https://github.com/ashishc/sample-java-project/blob/master/stat_hr_solid_24px.png

[Gondwana]

That image is not in greyscale file format. It is in 256-colour palette file format. It's the file format that counts; not the number of colours you're using.