Can I change the blue envelope to another color?

Hi! Wondering if I can change the blue envelope to another color? Preferably a light gray?

I'm not sure what envelope are you referring to. Is it the one from the Templates? https://www.jotform.com/form-templates/formulario-de-contacto-con-blue-theme-envelope

Unfortunately, you cannot change the color of the envelope on your end, since it is, actually, an image. Only the one who created the template will be able to change the color of it by editing the image itself outside of Jotform.

I contacted my colleague, Elton, who created the template and gave me this form that you can clone. 

https://form.jotform.com/60864546522964

The guide below will show you how you can clone a form from its URL.

How-to-Clone-an-Existing-Form-from-a-URL

Thank you.