i've been making sig's all day and out of the blue i get stuck with black to grey color only.....out of gamut colors
it's pissing me off i just want to reset the colors.... every tut,video link just explains what it is but no away of fixing it

any quick fix would be greatly appreciated

still iso help i cant get back to normal colors

You can try checking to make sure the image mode is set to RGB and not greyscale. That would be under image>mode. The color swatch tab has similar options that could have gotten messed up somehow. LMK if that helps.