This is an old revision of the document!
We've agreed that radial gradients should have a literate syntax. Linear gradients already kinda have one, in a simple way, and hopefully radials should end up thematically consistent.
Agreement so far:
radial-gradient(<shape> to <size> [other stuff], <color-stop>#) where shape is circle | ellipse, and size is the existing closest/furthest keywords or explicit size.
The only thing left to decide is what keyword to use for the positioning argument. This has to be decided in the context of the planned level 4 extension to allow setting the focus (the point where the 0% color emerges from) separately from the center of the gradient shape. It seems we have rough agreement on using focus and offset or focus-offset for box-relative and shape-center-relative focus positioning, respectively.
Proposals for shape-center are to use at, from, or position. We want to ensure that it's clear that the keyword specifies the shape-center, not the focus.
from has a nice symmetry with to. As well, if we extend linear-gradient in the future to allow a starting point, we'll almost certainly use from. However, it's also easy to think of it as specifying where the color starts (that is, the focus position), so the ambiguity makes it somewhat less good.at seems somewhat clearer than from and less prone to being confused with the focus. However, some feel that it doesn't read as well.position is pretty clear, but it breaks the readability. We'd basically just be naming parameters.