Looks like a display driver glitch.
What video card do you have?
Is that an animation file?
In other words the master psd of a gif animation.
Look under Window>Animation or Tmeline to bring up that panel.
Better check Channels panel, looks like spot color for me.
If your image is in RGB then i suppose there is Red, Green, Blue...and something else something like Spot Color 1 or Pantone blablabla.
If you don't want never to see it just move it to trash icon in Channels panel and you'll get 'cleen' image (wonder why you need that). Or you can use Merge Spot Channel in Channels menu that will blend (separate) it to RGB.
SeniorSSS it was the Channels. I will respond more later, but there was a reflex blue channel. Never seen that before. I wonder how I can change the color. Will look that up.
Thanks all for your comments..
Usually spot channels are used for printing additional color (plate) to CMYK (like gold, silver etc.). So in publishing they appear time after time.
Color can be changed easily, just double click on that channel in Channels panel. That will bring up "Spot Channel Options" dialog. In Ink Characteristics are option Color. Click on color you see. That will bring up "Select Spot Channel" or "Color Libraries" dialog (you can switch between them). Select color you want and that's it.
I'm having some trouble understanding why ANY channel data should show up in the image preview if no layer is visible.
Do these "spot channels" (which I have not used) have some kind of special life above and beyond Photoshop's layering? Should they?
I'm not much theorist but as i understand that - yes you said it very good - they have 'special' life.
I understand it that way. You don't paint (or else) in layer when you work with spot channel, you paint (or else) direct in channel. And there is no layer involved. Because you must kinda forget about colormode for the moment when working with spots. Each image have it's specific color mode like CMYK or RGB etc. Layer contain color information for these channels. Spot channel are separate form images original colormode and 'there is no room' for it in layer. That's how i see it (i should learn theory a little much but i'm too lazy).
You can switch spot channel on or off of course for viewing or merge it with other channels if you like effect but don't want to spend additional money for printing it (happens a lot).
Here is a screen shot of the channels palette. I was able to change the color by double clicking on it.
I am using this same file (just changing the color and resaving as a different file name) to work on and I have a question about the gradient.
I recently posted something about gradients and posterization and one of things these fine Photoshop experts told me to do was design at 16 bit. I notice this Photoshop file was created in 8 bit, yet the gradient appears smooth. I hope I do not run into problems with it, but we do have an offset printed piece of the original file (that I am working off of now) and it looks great. Just want to be sure it still looks great after the color is changed.
Thanks again for everyone's feedback/comments. SeniorSSS, who would have thought?
By the way, that Photoshop expert was Noel!
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Everything should be fine. Meaning that quality of spot channel don't change after "changing" color. Because you don't actually change anything, that color change by setting other color is just renaming (for my opinion). Of course, PS shows now diferent color but channel's greyscale information haven't change a bit.
Sorry, i'm not much of teller, hope you understand what i mean.
I forgot to make my 5 cents input about gradients
I can't tell about how it is with RGB. I've heard and read that 16bit is much better. Only minus i see is that with A3 300dpi it's about 1GB without any additional layers.
But if you know that result will be CMYK and it will have gradients then you have keep in mind that conversion to CMYK can make very wierd things to smooth and nice gradients.
In those case, personally i am working in CMYK from the start or point when gradient are added (if it have some photo then first things are done to it in RGB) to avoid unpredictable result (which can lead to situation when everthing needs to be redone).
And if gradients isn't smooth enough then there is trick with adding noise and gausian blur.
I have this file as CMYK. I always start files in CMYK. I am not using a spot color, I took that off and am using a CMYK color. I just hope this would be okay to use since this same file was used to print a different piece. The printed piece has a smooth gradient so I am hoping this one I modified will have the same effect seeing as I just changed the color. You are right though, the file doubles in size.
I don't understand now something. I thought that you change spot channel's (which contains gradient) color then i'm 100% sure (okey almost ). If you color corected CMYK gradient then i'm not 100% sure that result would be same.
If you CTRL+click on spot channel and use it as Solid Color (or Fill) with your color then again shoud be same quality.