How can I request for diverse emojis? None of these are available in shades of color.

It means:

This has nothing to do with Apple, they are administered by Unicode.org

It means that Apple isn't in charge of emojis, Unicode is. (The word "auspices" can be found in the OSX system dictionary).

Emoji acceptance falls under the auspices of Unicode - http://unicode.org/reports/tr51/

unicode.org/emoji/selection.html

You can request here. This has nothing to do with Apple, they are administered by Unicode.org