According to the Kohler timeline, Almond-47 has been the same since 1981. Online is useless outside of getting a general concept of the color. A monitor's tint, hue, etc. can be adjust to get a broad range from a single color. Get a hold of the color samples or bring the sink into a showroom.

Here is a link that might be useful: Kohler Color Timeline

we have a 1980's bathroom and needed to match a new almond sink--it's not the same--it's more of a bisque. So, the toilet is 1980 almond, and the sink is 2012 almond/bisque. all the tile is also 4x4 80's almond....looks totally fine, they are far enough apart you can't tell,plus the sink is recessed. I really wouldn't worry if they are a bit off!