Some yarns do not photograph in true color, and warping the colors makes everything else look weird. Here's an example:
Photographed in direct sunlight on concrete, no color adjustment
So the balls of yarn in the plastic bags look purplish, but the socks on the needles look reddish, right? (We are not starting another The Dress debate here!) Holding the actual socks up to the monitor, they are more like the color of the yarn in the plastic bags. That magenta color only darker. Not the dark red color. Now look at this:
Photographed indoors with overhead kitchen light (LED) and flash
Now the yarn in the right-hand bag looks like royal purple (compare to the yarn in the sacks above, from the sunlight picture), and the socks (esp.the right one just above the single strand of yarn crossing) is almost the right color, just a bit dark, when I hold the sock itself up to the screen to check, in a room lit by a window beside me, indirect daylight on a clear day. No direct sun. The left sock is picking up blue from the sky outside (upper half of window not curtained) and looks more straight purple. I fiddled with the histogram adjustment a bit, but any further tinkering with color balance (and yes, I looked) will make other things look weird. Like the table top.
I call the color I see on the sock itself dark magenta. The yarn in the plastic bags, in direct sun, is what I'd call magenta. The socks in direct sun are not magenta at all, but a very slightly purplish dark red...not even sure what to call that color. Claret, maybe?
Anyway, looking at the yarn, I thought of blackberry juice when I was making blackberry jelly, so they've become the blackberry pair. They will be in the "purple family" of socks (which right now has one pair of Cascade 220 Superwash in a purple heather, and one pair of Plymouth Yarn Galway Nep, a dullish purple with flecks of other colors in it. Blackberry is a lovely color, saturated and intense, and they're *almost* to the toe decreases. Both photograph fairly "true".
But I now have (slightly) more sympathy with the people who photograph yarn for the various online stores. Some of it cooperates and comes out looking the way it looks. Some very definitely does not. The emerald green I like for socks, another rich, saturated color, comes out unsaturated, paler--a sort of mid-to-light bluish green. And this one...well, you see what it did.
Meanwhile, though, the socks are growing and I might even have them ready for my birthday Saturday. For those who like the color, it's Ella rae Classic worsted weight, color #326. For other knitters, the top photo shows the heel construction (standard heel flap with heel stitch, the heel stitch continued under the heel for extra wear.