How do I repaint a wall so the old color shows through?

I had a painter paint an accent color on one wall almost two years ago. It was supposed to be a teal blue color, like Carribean water. Instead, it’s a dark teal green, and I hate it. But, this is my special wall in a house with only off-white and beige walls. Could I paint a lighter blue-green shade over it, but so that the darker green shows through, too? Maybe a white wash effect, using my hair dryer and a long extension cord to add bubbles and swirls as I do a 6’ sq. section at a time. I am not an artist, so I can’t paint real waves, but I thought I could give an impression of waves and deeper color this way. I have all the painting equipment I need except for more long rollers, and I think 1 gallon of paint, maybe Behr or another name brand would do the job. I even have lots of drop cloths and a creative son. What do you say, Hometalk? Could I have the paint and rollers? And Hometalkers, has anyone who is an amateur done something like this? Gimme suggestions, friends! ☺️