Terms and conditions for selling photos as stock photos

Not sure if this guy is a lawyer, but here's what I found on Quara, suggestion that both color AND shape can be copyrighted:

"You’ll run into trouble on this as long as it is your intent to commercialize the image, even without the brand name and original color.

Many products are copyrighted not just in brand name, text font, or color (Coca Cola, for example, copyrights not only the name Coca Cola, but the specific color red used throughout its branding), but also the shape (the Coke bottle shape is copyrighted and probably patented—though I’m not sure of that). You could take the name of the bottle, and change the red to blue, but the shape would still be covered under copyright law, and if you used it to promote other products or services, you’d face a lawsuit.

The best advice: When in doubt, leave it out."

Normally all branding should be removed. It is, as an example, not allowed to post images with the John Deere green-yellow branding. If your train and the picture here does violate your branding, has to be determined by checking the asset. Check here for more information and possibilities to report: https://helpx.adobe.com/stock/contributor/help/how-to-report-suspected-misuse-of-your-intellectual-property.html