Trying to color match between paint color brands isn’t a great practice because each company has a different color blending process, translating into slight variances in paint colors that look like significant (and often unexpected) differences on walls. If you want a Sherwin Williams equivalent, the closest match would be Sherwin Williams Patient White. It has less gray, so it’s warmer and less muted. Also, Behr Rosa Vieja could be a close substitute, although it has less prominent gray undertones than First Light.