Mysterious color-changing beads

Yesterday, I told you about a new, square stitch pattern I had worked with. I actually made 2 bracelets with this pattern; one purple, and one olive green, but the big difference between the two was the size of the Delica I used to stitch the design.

But the wider bracelet, the one made from size 8 Delicas (DBLs) didn't start out to be green, at all.

These are the DBLs I chose for this particular bracelet:

There are actually 2 different colors mixed together here - the solid black arrows near the bottom of the picture are pointing to the DBLs that I call "raku". The vendor calls this color "matte metallic blue iris" - and that hits 3 of my personal seed bead buttons: I am a sucker for metallics, for mattes, and for ANY color with "iris" in its name! So I couldn't wait to work with these beads! Look at the pretty blues, mauves, roses, greens, and bronze in these beads! Delicious! And, some of my favorite colors to work with, of course... 
The open arrow in the pic above points to the second tube of beads I added to this mix - a matte blue DBL that matches the blue in the "raku" DBLs perfectly. Right?

Until I started stitching, that is:

I mixed the beads together in one big pile, and started pulling them randomly as I stitched. By about the 3rd row, I noticed that all the "raku" DBLS were turning green or brown, but I kept stitching, thinking that I just needed to work up more of them, and their gorgeous raku-ness would blossom. After I had about an inch stitched, I convinced myself that something was wrong with the beads, like maybe they were mislabeled - I don't know what I was thinking. But I ripped out my stitching, sorted the two colors (Fun!) and put the raku ones back in their tube, and grabbed another tube of the same color. And started again.

Same result.

This really had me stumped. You can see the solid blue matte DBLs easily - amid all those olive green and coppery brown beads! Where did all the blue and the burgundy go? What was I doing wrong?

So I took the bracelet apart again, sorted the beads, again, and started over - for the last time.

I finished the bracelet, and had to change the size 11 seed bead I had chosen for the picot (my original choice was a vivid metallic burgundy seed bead that really highlighted the burgundies and roses in the pile of raku seed beads), and I chose an olive green 11 for the edging.

And I probably should have pulled out all those matte blue DBLs, and just gone with the greeny coppery brown ones ("matte metallic BLUE iris", remember) - but I didn't. This color combo is fine, but I just think I would like all the brown-green beads by themselves, better. Maybe next time!