Error after changing the color.png icon

[BigBlueHorse]

I am trying to change the color.png icon from the Microsoft 4 color box to our company logo. I have resized (pixels) our logo to match the size of the MS box. I've copied the new logo into the original zip file, however when I try to load the new app in Teams, I receive this message.
Error while reading manifest.json: Failed to find icon "color.png" file in the package.

Is it possible to change the color.png file in the zip package?
Thanks

[BigBlueHorse]

I am trying to change the color.png icon from the Microsoft 4 color box to our company logo. I have resized (pixels) our logo to match the size of the MS box. I've copied the new logo into the original zip file, however when I try to load the new app in Teams, I receive this message.
Error while reading manifest.json: Failed to find icon "color.png" file in the package.

Is it possible to change the color.png file in the zip package?
Thanks

Ok my mistake - the issue was with the naming of Color.png with a capital C instead of lower case.