All main colors have a blue around them on black glass.
On smaller sizes (4g and below) it gets harder to have the patterns on it, so there may be less of the main color and more shades of blue/green. So for example if the color is pink or red, it might be red or pink on the tips with shades of blue on the top.
The colors and no lefts/rights are the reason these are on clearance. And also because there will be no perfect matches.