The Thumbs Up: Dark Skin Tone emoji is a modifier sequence combining ? Thumbs Up and ? Dark Skin Tone. It is used as a single emoji on supported platforms.
Thumbs Up: Dark Skin Tone was added to Emoji 2.0 in 2015.
U+1F44D
U+1F3FF
?? Thumbs up sign
?? Emoji modifier fitzpatrick type-6