Are "oil colours" the same as "oil paints," or am I buying pigments by accident? I was looking at these oil colours from Winsor &amp; Newton and was just hoping someone more experienced could confirm that "Oil colours" = "Oil paints," and that I'm not inadvertently buying pigments that I need to mix with something to get the actual paint.
Basically, adding oil to ground pigment will turn it into oil paint; adding acrylic to ground pigment will turn it into acrylic paint; adding water to pigment will turn it into water colours...

So, this should be oil paint if it contains oil, and not just pigment.

(Where did you find this? Isn't there a description to the product? An image? If this is what you've been looking at, yes this is oil paint.)