I've been noticing lately that Photoshop doesn't seem to be capable of correctly displaying colors (or if not Photoshop, then every other displayer of images on my computer). I first noticed this back in April when I was working on this piece:

I made this image in Promotion and since my trial expired I could no longer export as a .gif so I just went and pasted it in Photoshop. To my annoyance, however, the pasted image was a bit less saturated. However, I did not find this same discrepancy posting it in Paint, and in Photoshop when I used the Save For Web option, it exported it using the original colors as intended. So in this particular instance there was really no harm done, but I'm now finding it frustrating.
I can't easily show you what I mean, since this only affects images while they are being viewed in Photoshop and not after they are saved or print-screened. Although, while testing it out, I created an image of just an indigo-ish blue color, and upon exporting it found it to lean more towards indigo than I had intended:

So basically, what would seem to be happening is when Photoshop exports images it seems to be leaning all my tertiary colors towards relative secondary colors, if that makes sense. Anyone know what would cause this? I'm pretty sure Photoshop isn't magically able to display more colors than other programs, so I don't understand why it would do this.