Your quilt is beautiful! Love your color choices.
I'm not a particular fan of borders but think they can definitely enhance a quilt when used judiciously.
My personal preference is for a darker border as the primary one, with perhaps either a very dark or a light/bright as a narrow inner border.
For this one I would have the narrow inner border the bright gold then the widest border the purple and use the aqua for binding. (To me this more closely keeps the proportions color wise of he rest of the quilt).
Although it would also look good with the aqua as the wider border and the purple as binding.

That sounds good to me. Not the same width.

Your quilt is awesome. To make it larger, I would use 2 of the colors for borders and the 3rd color for the binding.

This is a very busy quilt. A small border and then a larger border would calm the quilt down a little.

I guess it would depend where the quilt lies on the bed... if it needs to be a bit bigger to hang over enough then I think a border is necessary. However, your quilt top is beautiful just the way it is so... if it is already plenty long/wide enough to hang over, you may not want to add a border.

Funny I posted that comment because I always put a border on my quilts.... but I love the look of yours with or without a border!

I would take my 2nd favorite color in the quilt and do a small border, then a larger border of my most favorite color. Perhaps putting a corner stone of the alternating color. Beautiful quilt.

the 3 colors yellow ,blue and purple

I still like borders ! I like the three colors, I'd have to play with the size of each border. Beautiful!

Me, too. And I like the three fabrics you have auditioned. froggyintexas

I love the quilt, beautiful colors. And of course, Colorado skies (I'm from CO)! I think a yellow, or gold, border would frame it very nicely but not detract from the center of quilt.