Why are my vector image thumbs getting color saturation increase?

[Mott Jordan]

I have uploaded my vector images to numerous platforms including Instagram, Pinterest, Shutterstock, Creative Market, Tumblr, etc.  The color always stays true to my original.

   For some reason, when Adobe Stock creates thumbnails of my images, the color saturation gets uniquely cranked up. A subtle gray-green can turn into a bright, gaudy kelly green. A nuanced red becomes an oppressive hot pink, etc. 

   I spend a lot of time fine-tuning my color schemes to be lovely and harmonious.  It's a bit soul crushing to see such a dramatic conversion.  I upload in RGB. Does anyone know if uploading CMYK files circumvents this problem?  Any other solutions?

[HMFOZLAY]

I have faced the same problem but I can't get any solution.

[WFehr]

same. Regardless if they are RGB or CMYK, all my uploaded vectors appear dark and over-saturated. Is this going to create a problem for customers?

[Test Screen Name]

It's recommended that you supply the JPEG preview, in sRGB, rather than letting Adobe make a bad one.

[WFehr]

Thanks you.
So, is that a separate jpeg or an embedded one with the eps (or zipped set of files like other sites) and, can I upload an additional file later to existing files?

thanks for your help. 

[Abambo]

You create a sRGB JPEG file from your Ai-file. You pack both in a Zip and upload together. It is not possible to upload separately a JPEG preview. If your files are still in review, delete and resubmit. If they are approved, you need to judge if you want to delete and reupload.

I suggest also to contact contributor support. Maybe they can help you with existing approved files. Need help? (stock contributor support) 

I'm moving this to the contributor forum.