Most of the "simple" things, like smiling/frowning/teardrop use yellow smileys. But there are also some emoji like boy/girl/man with turban/police officer which seem to call for less abstraction, and then the artist has to pick a skin tone.
I didn't realize there were 1430 of them. It reminds me of clipart shovelware when CD-ROMs were a new thing and people felt a need to fill up all that empty space with...stuff.
Most of the "simple" things, like smiling/frowning/teardrop use yellow smileys. But there are also some emoji like boy/girl/man with turban/police officer which seem to call for less abstraction, and then the artist has to pick a skin tone.