I'm not too sure, in what your trying to ask. So I thought, I put a handle small list, and my interpretation to help you.
Mountains: mountain are all about grounding yourself. Maybe your going through a emotional time, right now, and feeling a little bit overwhelmed. Try to ground yourself, and meditate.
Clouds: clouds are all about the mind. "Your mind too cloudy," maybe your trying to solve too many problems take a pause, take it slow, in order to see the end of the finish line.
River: "don't go against the current. Go with it." You might be trying too hard on something, in your day to day life. If you go with the flow of life, you will find things will come to you a little bit easy. Maybe, even try to put the law of attraction into play.
Blue: blue normally to do with emotions. Or having faith, in oneself that they can get the job done right, or trusting the heavens above that all good things, comes to those who wait.
Glass: glass can be strong as it helps, holding the water in your cup, but at the same time it can easily break. Maybe your starting to see yourself as the victim, it might be something you need to forgive yourself, or others who have wronged you. You also might be feeling stressed about a situation, or maybe you feel like you don't have the strength. But glass can also be telling you, to stand up for yourself, every now and again. Show people that you are able to rule, of your own kingdom, or know you can get yourself out of any, overwhelming emotions. By working with them, and not against them.
Pine tree: seeing a project through to the end. If your working on anything, than maybe it's a little bit overwhelming, but the pine tree is telling you to see it through to the end. It might end up being alongevity project.
indigo: indigo could mean a lot of things. If you don't know your star seed originals. Than maybe you should research indigo child. It could also mean, that maybe you believed you have a unfair treatment against you, and maybe the gate way was there to tell you justice is coming into your life.
portal: (I don't know too much about portals.) but I do like to see them as door ways. Maybe you've finally came to terms to something that has been, nagging at you for a while, and the portal is opening up to you, like a new idea popping inside your mind.
It could also mean, that if your new, than your opening up a whole new world.
My thoughts: I wouldn't be too worried about not being able to change it into the right colour. From my own experience, I'm slowly starting to see if something won't change in my mind. Than, this is how I am meant to see it as, and the divine behind it, wishes me to view it as such.