What whites best match Kohler white?

Am remodeling a bathroom and have a new Kohler sink and toilet, but due to length and weight, have to do a different tub...does anyone know what would be the closest match to Kohler white? I've found tubs from American Standard and Crane that will fit our small space (we need a 4.5 or 4 foot tub)...but I'm afraid the American Standard white will be really off.

Thanks...jcwconsulting