1. On the emjoi's fonts there's "Raised Hand With Part Between Middle And Ring Fingers" - WhyTF is that not called "live long and prosper"? Some fonts are described by how they look while others are described by what they mean. A bit inconsistent but I guess that's more of a Unicode consortium issue.
2. Some of the hand emoji's like "White Left Pointing Backhand Index" are all called "white..." even though they've clearly done the race/skin tone colour spectrum ala whatsapp.
2b. The colours are a second unicode code (emoji modifier sequence) on the emoji ranging from U+1F3FB (white/pale) to 1F3FF (black/dark). (Btw, that's counter intuitive to programmers since RGB colour codes have "#00" being dark and "#FF" being light.) P.S. I haven't decided if the skin colour aspect of emoji's is racist or not. There may be some people who found the default yellow emoji's racist.
Answer to #2:
Names of symbols such as BLACK MEDIUM SQUARE or WHITE MEDIUM SQUARE are not meant to indicate that the corresponding character must be presented in black or white, respectively; rather, the use of “black” and “white” in the names is generally just to contrast filled versus outline shapes, or a darker color fill versus a lighter color fill. Similarly, in other symbols such as the hands U+261A BLACK LEFT POINTING INDEX and U+261C WHITE LEFT POINTING INDEX, the words “white” and “black” also refer to outlined versus filled, and do not indicate skin color.
and
General-purpose emoji for people and body parts should also not be given overly specific images: the general recommendation is to be as neutral as possible regarding race, ethnicity, and gender. Thus for the character U+1F777 CONSTRUCTION WORKER, the recommendation is to use a neutral graphic like (with an orange skin tone) instead of an overly specific image like (with a light skin tone). This includes the emoji modifier base characters listed in Sample Emoji Modifier Bases. The emoji modifiers allow for variations in skin tone to be expressed.